diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt
index 7abd4db8f18..4c8e8ccd3ba 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt
@@ -227,6 +227,7 @@ internal class DelegatedMemberGenerator(
                                         type = IrSimpleTypeImpl(it.symbol, false, emptyList(), emptyList())
                                     )
                                 )
+                                it.superTypes += typeParameter.superTypes
                             }
                         }
                     }