diff --git a/compiler/ir/serialization.common/src/KotlinIr.proto b/compiler/ir/serialization.common/src/KotlinIr.proto
index 436a06aa45c..6fda4f7808e 100644
--- a/compiler/ir/serialization.common/src/KotlinIr.proto
+++ b/compiler/ir/serialization.common/src/KotlinIr.proto
@@ -517,6 +517,7 @@ message IrFunctionBase {
   repeated IrValueParameter value_parameter = 9;
   optional int32 body = 10;
   required int32 return_type = 11;
+  required bool is_expect = 12;
 }
 
 message IrFunction {
@@ -531,7 +532,6 @@ message IrFunction {
 message IrConstructor {
   required IrFunctionBase base = 1;
   required bool is_primary = 2;
-
 }
 
 message IrField {
@@ -568,6 +568,7 @@ message IrProperty {
   optional IrField backing_field = 10;
   optional IrFunction getter = 11;
   optional IrFunction setter = 12;
+  required bool is_expect = 13;
 }
 
 message IrVariable {
@@ -636,6 +637,7 @@ message IrClass {
   required IrTypeParameterContainer type_parameters = 12;
   required IrDeclarationContainer declaration_container = 13;
   repeated int32 super_type = 14;
+  required bool is_expect = 15;
 }
 
 message IrTypeAlias {
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt
index 1bc28ada8cc..d8ae9e6f043 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt
@@ -985,7 +985,7 @@ abstract class IrFileDeserializer(
                     isData = proto.isData,
                     isExternal = proto.isExternal,
                     isInline = proto.isInline,
-                    isExpect = false // TODO isExpect
+                    isExpect = proto.isExpect
                 )
             }.usingParent {
                 proto.declarationContainer.declarationList.mapTo(declarations) { deserializeDeclaration(it) }
@@ -1057,7 +1057,7 @@ abstract class IrFileDeserializer(
                     isExternal = proto.base.isExternal,
                     isTailrec = proto.isTailrec,
                     isSuspend = proto.isSuspend,
-                    isExpect = false // TODO isExpect
+                    isExpect = proto.base.isExpect
                 )
             }.apply {
                 proto.overriddenList.mapTo(overriddenSymbols) { deserializeIrSymbol(it) as IrSimpleFunctionSymbol }
@@ -1141,7 +1141,7 @@ abstract class IrFileDeserializer(
                     isInline = proto.base.isInline,
                     isExternal = proto.base.isExternal,
                     isPrimary = proto.isPrimary,
-                    isExpect = false // TODO isExpect
+                    isExpect = proto.base.isExpect
                 )
             }.apply {
                 (descriptor as? WrappedClassConstructorDescriptor)?.bind(this)
@@ -1212,11 +1212,12 @@ abstract class IrFileDeserializer(
                     deserializeName(proto.name),
                     deserializeVisibility(proto.visibility),
                     deserializeModality(proto.modality),
-                    proto.isVar,
-                    proto.isConst,
-                    proto.isLateinit,
-                    proto.isDelegated,
-                    proto.isExternal
+                    isVar = proto.isVar,
+                    isConst = proto.isConst,
+                    isLateinit = proto.isLateinit,
+                    isDelegated = proto.isDelegated,
+                    isExpect = proto.isExpect,
+                    isExternal = proto.isExternal
                 )
             }.apply {
                 if (proto.hasGetter()) {
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt
index 962c1c0b311..0a2258690c8 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt
@@ -1033,6 +1033,7 @@ open class IrFileSerializer(
             .setVisibility(serializeVisibility(function.visibility))
             .setIsInline(function.isInline)
             .setIsExternal(function.isExternal)
+            .setIsExpect(function.isExpect)
             .setReturnType(serializeIrType(function.returnType))
             .setTypeParameters(serializeIrTypeParameterContainer(function.typeParameters))
 
@@ -1108,6 +1109,7 @@ open class IrFileSerializer(
             .setIsLateinit(property.isLateinit)
             .setIsDelegated(property.isDelegated)
             .setIsExternal(property.isExternal)
+            .setIsExpect(property.isExpect)
 
         val backingField = property.backingField
         val getter = property.getter
@@ -1180,6 +1182,7 @@ open class IrFileSerializer(
             .setIsData(clazz.isData)
             .setIsExternal(clazz.isExternal)
             .setIsInline(clazz.isInline)
+            .setIsExpect(clazz.isExpect)
             .setTypeParameters(serializeIrTypeParameterContainer(clazz.typeParameters))
             .setDeclarationContainer(serializeIrDeclarationContainer(clazz.declarations))
         clazz.superTypes.forEach {
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClass.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClass.java
index e4698cfd434..77be52d4303 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClass.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClass.java
@@ -193,6 +193,11 @@ public final class IrClass extends
             input.popLimit(limit);
             break;
           }
+          case 120: {
+            bitField0_ |= 0x00002000;
+            isExpect_ = input.readBool();
+            break;
+          }
         }
       }
     } catch (org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException e) {
@@ -455,6 +460,21 @@ public final class IrClass extends
     return superType_.get(index);
   }
 
+  public static final int IS_EXPECT_FIELD_NUMBER = 15;
+  private boolean isExpect_;
+  /**
+   * <code>required bool is_expect = 15;</code>
+   */
+  public boolean hasIsExpect() {
+    return ((bitField0_ & 0x00002000) == 0x00002000);
+  }
+  /**
+   * <code>required bool is_expect = 15;</code>
+   */
+  public boolean getIsExpect() {
+    return isExpect_;
+  }
+
   private void initFields() {
     base_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrDeclarationBase.getDefaultInstance();
     name_ = 0;
@@ -470,6 +490,7 @@ public final class IrClass extends
     typeParameters_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeParameterContainer.getDefaultInstance();
     declarationContainer_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrDeclarationContainer.getDefaultInstance();
     superType_ = java.util.Collections.emptyList();
+    isExpect_ = false;
   }
   private byte memoizedIsInitialized = -1;
   public final boolean isInitialized() {
@@ -525,6 +546,10 @@ public final class IrClass extends
       memoizedIsInitialized = 0;
       return false;
     }
+    if (!hasIsExpect()) {
+      memoizedIsInitialized = 0;
+      return false;
+    }
     if (!getBase().isInitialized()) {
       memoizedIsInitialized = 0;
       return false;
@@ -596,6 +621,9 @@ public final class IrClass extends
     for (int i = 0; i < superType_.size(); i++) {
       output.writeInt32(14, superType_.get(i));
     }
+    if (((bitField0_ & 0x00002000) == 0x00002000)) {
+      output.writeBool(15, isExpect_);
+    }
     output.writeRawBytes(unknownFields);
   }
 
@@ -666,6 +694,10 @@ public final class IrClass extends
       size += dataSize;
       size += 1 * getSuperTypeList().size();
     }
+    if (((bitField0_ & 0x00002000) == 0x00002000)) {
+      size += org.jetbrains.kotlin.protobuf.CodedOutputStream
+        .computeBoolSize(15, isExpect_);
+    }
     size += unknownFields.size();
     memoizedSerializedSize = size;
     return size;
@@ -788,6 +820,8 @@ public final class IrClass extends
       bitField0_ = (bitField0_ & ~0x00001000);
       superType_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00002000);
+      isExpect_ = false;
+      bitField0_ = (bitField0_ & ~0x00004000);
       return this;
     }
 
@@ -868,6 +902,10 @@ public final class IrClass extends
         bitField0_ = (bitField0_ & ~0x00002000);
       }
       result.superType_ = superType_;
+      if (((from_bitField0_ & 0x00004000) == 0x00004000)) {
+        to_bitField0_ |= 0x00002000;
+      }
+      result.isExpect_ = isExpect_;
       result.bitField0_ = to_bitField0_;
       return result;
     }
@@ -923,6 +961,9 @@ public final class IrClass extends
         }
         
       }
+      if (other.hasIsExpect()) {
+        setIsExpect(other.getIsExpect());
+      }
       setUnknownFields(
           getUnknownFields().concat(other.unknownFields));
       return this;
@@ -977,6 +1018,10 @@ public final class IrClass extends
         
         return false;
       }
+      if (!hasIsExpect()) {
+        
+        return false;
+      }
       if (!getBase().isInitialized()) {
         
         return false;
@@ -1665,6 +1710,38 @@ public final class IrClass extends
       return this;
     }
 
+    private boolean isExpect_ ;
+    /**
+     * <code>required bool is_expect = 15;</code>
+     */
+    public boolean hasIsExpect() {
+      return ((bitField0_ & 0x00004000) == 0x00004000);
+    }
+    /**
+     * <code>required bool is_expect = 15;</code>
+     */
+    public boolean getIsExpect() {
+      return isExpect_;
+    }
+    /**
+     * <code>required bool is_expect = 15;</code>
+     */
+    public Builder setIsExpect(boolean value) {
+      bitField0_ |= 0x00004000;
+      isExpect_ = value;
+      
+      return this;
+    }
+    /**
+     * <code>required bool is_expect = 15;</code>
+     */
+    public Builder clearIsExpect() {
+      bitField0_ = (bitField0_ & ~0x00004000);
+      isExpect_ = false;
+      
+      return this;
+    }
+
     // @@protoc_insertion_point(builder_scope:org.jetbrains.kotlin.backend.common.serialization.proto.IrClass)
   }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClassOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClassOrBuilder.java
index 095a7c92f56..3b8911e6f27 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClassOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrClassOrBuilder.java
@@ -144,4 +144,13 @@ public interface IrClassOrBuilder extends
    * <code>repeated int32 super_type = 14;</code>
    */
   int getSuperType(int index);
+
+  /**
+   * <code>required bool is_expect = 15;</code>
+   */
+  boolean hasIsExpect();
+  /**
+   * <code>required bool is_expect = 15;</code>
+   */
+  boolean getIsExpect();
 }
\ No newline at end of file
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBase.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBase.java
index f6020e75eb1..50e7f4e38e2 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBase.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBase.java
@@ -151,6 +151,11 @@ public final class IrFunctionBase extends
             returnType_ = input.readInt32();
             break;
           }
+          case 96: {
+            bitField0_ |= 0x00000400;
+            isExpect_ = input.readBool();
+            break;
+          }
         }
       }
     } catch (org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException e) {
@@ -373,6 +378,21 @@ public final class IrFunctionBase extends
     return returnType_;
   }
 
+  public static final int IS_EXPECT_FIELD_NUMBER = 12;
+  private boolean isExpect_;
+  /**
+   * <code>required bool is_expect = 12;</code>
+   */
+  public boolean hasIsExpect() {
+    return ((bitField0_ & 0x00000400) == 0x00000400);
+  }
+  /**
+   * <code>required bool is_expect = 12;</code>
+   */
+  public boolean getIsExpect() {
+    return isExpect_;
+  }
+
   private void initFields() {
     base_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrDeclarationBase.getDefaultInstance();
     name_ = 0;
@@ -385,6 +405,7 @@ public final class IrFunctionBase extends
     valueParameter_ = java.util.Collections.emptyList();
     body_ = 0;
     returnType_ = 0;
+    isExpect_ = false;
   }
   private byte memoizedIsInitialized = -1;
   public final boolean isInitialized() {
@@ -420,6 +441,10 @@ public final class IrFunctionBase extends
       memoizedIsInitialized = 0;
       return false;
     }
+    if (!hasIsExpect()) {
+      memoizedIsInitialized = 0;
+      return false;
+    }
     if (!getBase().isInitialized()) {
       memoizedIsInitialized = 0;
       return false;
@@ -490,6 +515,9 @@ public final class IrFunctionBase extends
     if (((bitField0_ & 0x00000200) == 0x00000200)) {
       output.writeInt32(11, returnType_);
     }
+    if (((bitField0_ & 0x00000400) == 0x00000400)) {
+      output.writeBool(12, isExpect_);
+    }
     output.writeRawBytes(unknownFields);
   }
 
@@ -543,6 +571,10 @@ public final class IrFunctionBase extends
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeInt32Size(11, returnType_);
     }
+    if (((bitField0_ & 0x00000400) == 0x00000400)) {
+      size += org.jetbrains.kotlin.protobuf.CodedOutputStream
+        .computeBoolSize(12, isExpect_);
+    }
     size += unknownFields.size();
     memoizedSerializedSize = size;
     return size;
@@ -659,6 +691,8 @@ public final class IrFunctionBase extends
       bitField0_ = (bitField0_ & ~0x00000200);
       returnType_ = 0;
       bitField0_ = (bitField0_ & ~0x00000400);
+      isExpect_ = false;
+      bitField0_ = (bitField0_ & ~0x00000800);
       return this;
     }
 
@@ -727,6 +761,10 @@ public final class IrFunctionBase extends
         to_bitField0_ |= 0x00000200;
       }
       result.returnType_ = returnType_;
+      if (((from_bitField0_ & 0x00000800) == 0x00000800)) {
+        to_bitField0_ |= 0x00000400;
+      }
+      result.isExpect_ = isExpect_;
       result.bitField0_ = to_bitField0_;
       return result;
     }
@@ -773,6 +811,9 @@ public final class IrFunctionBase extends
       if (other.hasReturnType()) {
         setReturnType(other.getReturnType());
       }
+      if (other.hasIsExpect()) {
+        setIsExpect(other.getIsExpect());
+      }
       setUnknownFields(
           getUnknownFields().concat(other.unknownFields));
       return this;
@@ -807,6 +848,10 @@ public final class IrFunctionBase extends
         
         return false;
       }
+      if (!hasIsExpect()) {
+        
+        return false;
+      }
       if (!getBase().isInitialized()) {
         
         return false;
@@ -1444,6 +1489,38 @@ public final class IrFunctionBase extends
       return this;
     }
 
+    private boolean isExpect_ ;
+    /**
+     * <code>required bool is_expect = 12;</code>
+     */
+    public boolean hasIsExpect() {
+      return ((bitField0_ & 0x00000800) == 0x00000800);
+    }
+    /**
+     * <code>required bool is_expect = 12;</code>
+     */
+    public boolean getIsExpect() {
+      return isExpect_;
+    }
+    /**
+     * <code>required bool is_expect = 12;</code>
+     */
+    public Builder setIsExpect(boolean value) {
+      bitField0_ |= 0x00000800;
+      isExpect_ = value;
+      
+      return this;
+    }
+    /**
+     * <code>required bool is_expect = 12;</code>
+     */
+    public Builder clearIsExpect() {
+      bitField0_ = (bitField0_ & ~0x00000800);
+      isExpect_ = false;
+      
+      return this;
+    }
+
     // @@protoc_insertion_point(builder_scope:org.jetbrains.kotlin.backend.common.serialization.proto.IrFunctionBase)
   }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBaseOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBaseOrBuilder.java
index 98550ad76f8..0d9912cee5d 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBaseOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFunctionBaseOrBuilder.java
@@ -110,4 +110,13 @@ public interface IrFunctionBaseOrBuilder extends
    * <code>required int32 return_type = 11;</code>
    */
   int getReturnType();
+
+  /**
+   * <code>required bool is_expect = 12;</code>
+   */
+  boolean hasIsExpect();
+  /**
+   * <code>required bool is_expect = 12;</code>
+   */
+  boolean getIsExpect();
 }
\ No newline at end of file
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrProperty.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrProperty.java
index 267ff5ecccc..db2e6a65e96 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrProperty.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrProperty.java
@@ -160,6 +160,11 @@ public final class IrProperty extends
             bitField0_ |= 0x00000800;
             break;
           }
+          case 104: {
+            bitField0_ |= 0x00001000;
+            isExpect_ = input.readBool();
+            break;
+          }
         }
       }
     } catch (org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException e) {
@@ -374,6 +379,21 @@ public final class IrProperty extends
     return setter_;
   }
 
+  public static final int IS_EXPECT_FIELD_NUMBER = 13;
+  private boolean isExpect_;
+  /**
+   * <code>required bool is_expect = 13;</code>
+   */
+  public boolean hasIsExpect() {
+    return ((bitField0_ & 0x00001000) == 0x00001000);
+  }
+  /**
+   * <code>required bool is_expect = 13;</code>
+   */
+  public boolean getIsExpect() {
+    return isExpect_;
+  }
+
   private void initFields() {
     base_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrDeclarationBase.getDefaultInstance();
     name_ = 0;
@@ -387,6 +407,7 @@ public final class IrProperty extends
     backingField_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrField.getDefaultInstance();
     getter_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrFunction.getDefaultInstance();
     setter_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrFunction.getDefaultInstance();
+    isExpect_ = false;
   }
   private byte memoizedIsInitialized = -1;
   public final boolean isInitialized() {
@@ -430,6 +451,10 @@ public final class IrProperty extends
       memoizedIsInitialized = 0;
       return false;
     }
+    if (!hasIsExpect()) {
+      memoizedIsInitialized = 0;
+      return false;
+    }
     if (!getBase().isInitialized()) {
       memoizedIsInitialized = 0;
       return false;
@@ -499,6 +524,9 @@ public final class IrProperty extends
     if (((bitField0_ & 0x00000800) == 0x00000800)) {
       output.writeMessage(12, setter_);
     }
+    if (((bitField0_ & 0x00001000) == 0x00001000)) {
+      output.writeBool(13, isExpect_);
+    }
     output.writeRawBytes(unknownFields);
   }
 
@@ -556,6 +584,10 @@ public final class IrProperty extends
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeMessageSize(12, setter_);
     }
+    if (((bitField0_ & 0x00001000) == 0x00001000)) {
+      size += org.jetbrains.kotlin.protobuf.CodedOutputStream
+        .computeBoolSize(13, isExpect_);
+    }
     size += unknownFields.size();
     memoizedSerializedSize = size;
     return size;
@@ -674,6 +706,8 @@ public final class IrProperty extends
       bitField0_ = (bitField0_ & ~0x00000400);
       setter_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrFunction.getDefaultInstance();
       bitField0_ = (bitField0_ & ~0x00000800);
+      isExpect_ = false;
+      bitField0_ = (bitField0_ & ~0x00001000);
       return this;
     }
 
@@ -745,6 +779,10 @@ public final class IrProperty extends
         to_bitField0_ |= 0x00000800;
       }
       result.setter_ = setter_;
+      if (((from_bitField0_ & 0x00001000) == 0x00001000)) {
+        to_bitField0_ |= 0x00001000;
+      }
+      result.isExpect_ = isExpect_;
       result.bitField0_ = to_bitField0_;
       return result;
     }
@@ -787,6 +825,9 @@ public final class IrProperty extends
       if (other.hasSetter()) {
         mergeSetter(other.getSetter());
       }
+      if (other.hasIsExpect()) {
+        setIsExpect(other.getIsExpect());
+      }
       setUnknownFields(
           getUnknownFields().concat(other.unknownFields));
       return this;
@@ -829,6 +870,10 @@ public final class IrProperty extends
         
         return false;
       }
+      if (!hasIsExpect()) {
+        
+        return false;
+      }
       if (!getBase().isInitialized()) {
         
         return false;
@@ -1404,6 +1449,38 @@ public final class IrProperty extends
       return this;
     }
 
+    private boolean isExpect_ ;
+    /**
+     * <code>required bool is_expect = 13;</code>
+     */
+    public boolean hasIsExpect() {
+      return ((bitField0_ & 0x00001000) == 0x00001000);
+    }
+    /**
+     * <code>required bool is_expect = 13;</code>
+     */
+    public boolean getIsExpect() {
+      return isExpect_;
+    }
+    /**
+     * <code>required bool is_expect = 13;</code>
+     */
+    public Builder setIsExpect(boolean value) {
+      bitField0_ |= 0x00001000;
+      isExpect_ = value;
+      
+      return this;
+    }
+    /**
+     * <code>required bool is_expect = 13;</code>
+     */
+    public Builder clearIsExpect() {
+      bitField0_ = (bitField0_ & ~0x00001000);
+      isExpect_ = false;
+      
+      return this;
+    }
+
     // @@protoc_insertion_point(builder_scope:org.jetbrains.kotlin.backend.common.serialization.proto.IrProperty)
   }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrPropertyOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrPropertyOrBuilder.java
index fdb28f5d6bf..a48bb1ab456 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrPropertyOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrPropertyOrBuilder.java
@@ -114,4 +114,13 @@ public interface IrPropertyOrBuilder extends
    * <code>optional .org.jetbrains.kotlin.backend.common.serialization.proto.IrFunction setter = 12;</code>
    */
   org.jetbrains.kotlin.backend.common.serialization.proto.IrFunction getSetter();
+
+  /**
+   * <code>required bool is_expect = 13;</code>
+   */
+  boolean hasIsExpect();
+  /**
+   * <code>required bool is_expect = 13;</code>
+   */
+  boolean getIsExpect();
 }
\ No newline at end of file