diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java b/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java
index 2240b8ad5ca..342bbf8ecad 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java
@@ -751,6 +751,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
         mv.visitInsn(RETURN);
         FunctionCodegen.endVisit(mv, "constructor", myClass);
 
+        assert constructorDescriptor != null;
         FunctionCodegen.generateDefaultIfNeeded(constructorContext, state, v, constructorMethod.getAsmMethod(), constructorDescriptor,
                                                 OwnerKind.IMPLEMENTATION);
     }
diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/PropertyCodegen.java b/compiler/backend/src/org/jetbrains/jet/codegen/PropertyCodegen.java
index 74e7957889c..dad268eb5f8 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/PropertyCodegen.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/PropertyCodegen.java
@@ -143,7 +143,6 @@ public class PropertyCodegen {
                 assert setterDescriptor != null;
                 JvmPropertyAccessorSignature signature =
                         state.getInjector().getJetTypeMapper().mapSetterSignature(propertyDescriptor, kind);
-                assert signature != null;
                 functionCodegen.generateMethod(setter, signature.getJvmMethodSignature(), true, signature.getPropertyTypeKotlinSignature(),
                                                setterDescriptor);
             }
@@ -298,7 +297,7 @@ public class PropertyCodegen {
         }
 
         JvmPropertyAccessorSignature signature = state.getInjector().getJetTypeMapper().mapSetterSignature(propertyDescriptor, kind);
-        assert signature != null;
+        assert true;
         final String descriptor = signature.getJvmMethodSignature().getAsmMethod().getDescriptor();
         MethodVisitor mv = v.newMethod(origin, flags, setterName(propertyDescriptor.getName()), descriptor, null, null);
         PropertySetterDescriptor setter = propertyDescriptor.getSetter();
@@ -367,7 +366,6 @@ public class PropertyCodegen {
 
         if (declaration.isVar()) {
             jvmPropertyAccessorSignature = state.getInjector().getJetTypeMapper().mapSetterSignature(declaration, OwnerKind.IMPLEMENTATION);
-            assert jvmPropertyAccessorSignature != null;
             functionCodegen.genDelegate(declaration, overriddenDescriptor, field, jvmPropertyAccessorSignature.getJvmMethodSignature());
         }
     }