diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/SamCodegenUtil.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/SamCodegenUtil.java
index a132599786d..19c2fbbbb32 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/SamCodegenUtil.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/SamCodegenUtil.java
@@ -18,7 +18,6 @@ package org.jetbrains.kotlin.codegen;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor;
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
 import org.jetbrains.kotlin.load.java.descriptors.SamAdapterDescriptor;
 import org.jetbrains.kotlin.synthetic.SamAdapterExtensionFunctionDescriptor;
@@ -26,13 +25,12 @@ import org.jetbrains.kotlin.synthetic.SamAdapterExtensionFunctionDescriptor;
 public class SamCodegenUtil {
     @Nullable
     public static FunctionDescriptor getOriginalIfSamAdapter(@NotNull FunctionDescriptor fun) {
-        FunctionDescriptor original = fun.getOriginal();
-        if (original instanceof SamAdapterDescriptor<?>) {
-            return ((SamAdapterDescriptor<?>) original).getOriginForSam();
+        if (fun instanceof SamAdapterDescriptor<?>) {
+            return ((SamAdapterDescriptor<?>) fun).getOriginForSam();
         }
 
-        if (original instanceof SamAdapterExtensionFunctionDescriptor) {
-            return ((SamAdapterExtensionFunctionDescriptor) original).getSourceFunction();
+        if (fun instanceof SamAdapterExtensionFunctionDescriptor) {
+            return ((SamAdapterExtensionFunctionDescriptor) fun).getSourceFunction();
         }
 
         return null;
diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/binding/CodegenAnnotatingVisitor.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/binding/CodegenAnnotatingVisitor.java
index 78fe4a8bd66..275e724b889 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/binding/CodegenAnnotatingVisitor.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/binding/CodegenAnnotatingVisitor.java
@@ -26,10 +26,10 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.cfg.WhenChecker;
 import org.jetbrains.kotlin.codegen.*;
 import org.jetbrains.kotlin.codegen.state.GenerationState;
+import org.jetbrains.kotlin.codegen.state.TypeMapperUtilsKt;
 import org.jetbrains.kotlin.codegen.when.SwitchCodegenUtil;
 import org.jetbrains.kotlin.codegen.when.WhenByEnumsMapping;
 import org.jetbrains.kotlin.descriptors.*;
-import org.jetbrains.kotlin.descriptors.impl.ClassDescriptorImpl;
 import org.jetbrains.kotlin.fileClasses.FileClasses;
 import org.jetbrains.kotlin.fileClasses.JvmFileClassesProvider;
 import org.jetbrains.kotlin.load.java.descriptors.SamConstructorDescriptor;
@@ -46,8 +46,7 @@ import org.jetbrains.kotlin.resolve.calls.model.ResolvedValueArgument;
 import org.jetbrains.kotlin.resolve.constants.ConstantValue;
 import org.jetbrains.kotlin.resolve.constants.EnumValue;
 import org.jetbrains.kotlin.resolve.constants.NullValue;
-import org.jetbrains.kotlin.resolve.scopes.MemberScope;
-import org.jetbrains.kotlin.resolve.source.KotlinSourceElementKt;
+import org.jetbrains.kotlin.synthetic.SamAdapterExtensionFunctionDescriptor;
 import org.jetbrains.kotlin.types.KotlinType;
 import org.jetbrains.org.objectweb.asm.Type;
 
@@ -411,7 +410,7 @@ class CodegenAnnotatingVisitor extends KtVisitorVoid {
         if (valueArguments == null) return;
 
         for (ValueParameterDescriptor valueParameter : original.getValueParameters()) {
-            SamType samType = SamType.create(valueParameter.getType());
+            SamType samType = SamType.create(TypeMapperUtilsKt.removeExternalProjections(valueParameter.getType()));
             if (samType == null) continue;
 
             ResolvedValueArgument resolvedValueArgument = valueArguments.get(valueParameter.getIndex());
diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/state/typeMapperUtils.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/state/typeMapperUtils.kt
index 8437273baf9..01251803910 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/state/typeMapperUtils.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/state/typeMapperUtils.kt
@@ -78,4 +78,9 @@ fun CallableMemberDescriptor.createTypeParameterWithNewName(descriptor: TypePara
     }
     newDescriptor.setInitialized()
     return newDescriptor
+}
+
+fun KotlinType.removeExternalProjections(): KotlinType {
+    val newArguments = arguments.map { TypeProjectionImpl(Variance.INVARIANT, it.type) }
+    return replace(newArguments)
 }
\ No newline at end of file
diff --git a/compiler/testData/codegen/boxAgainstJava/sam/kt11519.kt b/compiler/testData/codegen/boxAgainstJava/sam/kt11519.kt
new file mode 100644
index 00000000000..2cd32770696
--- /dev/null
+++ b/compiler/testData/codegen/boxAgainstJava/sam/kt11519.kt
@@ -0,0 +1,39 @@
+// FILE: Custom.java
+
+class Custom<K, V> {
+    private K k;
+
+    private V v;
+
+    public Custom(K k, V v) {
+        this.k = k;
+        this.v = v;
+    }
+
+    public interface MBiConsumer<T, U> {
+        void accept(T t, U u);
+    }
+
+    public void forEach(MBiConsumer<? super K, ? super V> action) {
+        action.accept(k, v);
+    }
+}
+
+// FILE: 1.kt
+
+import java.util.Arrays
+
+fun box(): String {
+    val instance = Custom<String, String>("O", "K")
+    var result = "fail"
+    instance.forEach { a, b ->
+        result = a + b
+    }
+
+    val superInterfaces = Arrays.toString((Class.forName("_1Kt\$box$1")).genericInterfaces)
+    if (superInterfaces != "[Custom.Custom\$MBiConsumer<java.lang.String, java.lang.String>]") {
+        return "fail: $superInterfaces"
+    }
+
+    return result
+}
diff --git a/compiler/testData/codegen/boxAgainstJava/sam/kt11519Constructor.kt b/compiler/testData/codegen/boxAgainstJava/sam/kt11519Constructor.kt
new file mode 100644
index 00000000000..39a0471a54e
--- /dev/null
+++ b/compiler/testData/codegen/boxAgainstJava/sam/kt11519Constructor.kt
@@ -0,0 +1,39 @@
+// FILE: Custom.java
+
+class Custom<K, V> {
+    public interface MBiConsumer<T, U> {
+        void accept(T t, U u);
+    }
+
+    private K k;
+
+    private V v;
+
+    public Custom(K k, V v) {
+        this.k = k;
+        this.v = v;
+    }
+
+    public void forEach(MBiConsumer<? super K, ? super V> action) {
+        action.accept(k, v);
+    }
+}
+
+// FILE: 1.kt
+
+import java.util.Arrays
+
+fun box(): String {
+    val instance = Custom<String, String>("O", "K")
+    var result = "fail"
+    instance.forEach (Custom.MBiConsumer<String, String> { a, b ->
+        result = a + b
+    })
+
+    val superInterfaces = Arrays.toString((Class.forName("_1Kt\$box$1")).genericInterfaces)
+    if (superInterfaces != "[Custom.Custom\$MBiConsumer<java.lang.String, java.lang.String>]") {
+        return "fail: $superInterfaces"
+    }
+
+    return result
+}
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxAgainstJavaCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxAgainstJavaCodegenTestGenerated.java
index 5b22116a121..d291b2538b3 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxAgainstJavaCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxAgainstJavaCodegenTestGenerated.java
@@ -481,6 +481,18 @@ public class BlackBoxAgainstJavaCodegenTestGenerated extends AbstractBlackBoxAga
             doTest(fileName);
         }
 
+        @TestMetadata("kt11519.kt")
+        public void testKt11519() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/boxAgainstJava/sam/kt11519.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("kt11519Constructor.kt")
+        public void testKt11519Constructor() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/boxAgainstJava/sam/kt11519Constructor.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("kt4753.kt")
         public void testKt4753() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/boxAgainstJava/sam/kt4753.kt");