diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/state/KotlinTypeMapper.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/state/KotlinTypeMapper.kt
index 75a3ab987f2..09ed33c365a 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/state/KotlinTypeMapper.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/state/KotlinTypeMapper.kt
@@ -1241,10 +1241,6 @@ class KotlinTypeMapper @JvmOverloads constructor(
                 throw IllegalStateException(generateErrorMessageForErrorType(kotlinType, descriptor))
             }
 
-            override fun releaseCoroutines(): Boolean {
-                return false
-            }
-
             override fun preprocessType(kotlinType: KotlinType): KotlinType? {
                 return null
             }
diff --git a/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/methodSignatureMapping.kt b/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/methodSignatureMapping.kt
index 8c8af81c128..2207ae31504 100644
--- a/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/methodSignatureMapping.kt
+++ b/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/methodSignatureMapping.kt
@@ -163,6 +163,4 @@ internal object TypeMappingConfigurationImpl : TypeMappingConfiguration<JvmType>
     override fun processErrorType(kotlinType: KotlinType, descriptor: ClassDescriptor) {
         // DO nothing
     }
-
-    override fun releaseCoroutines() = false
 }
diff --git a/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/typeSignatureMapping.kt b/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/typeSignatureMapping.kt
index 84118cbbd83..8e016e26bf2 100644
--- a/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/typeSignatureMapping.kt
+++ b/core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/typeSignatureMapping.kt
@@ -44,7 +44,7 @@ interface TypeMappingConfiguration<out T : Any> {
     // returns null when type doesn't need to be preprocessed
     fun preprocessType(kotlinType: KotlinType): KotlinType? = null
 
-    fun releaseCoroutines(): Boolean
+    fun releaseCoroutines(): Boolean = true
 }
 
 const val NON_EXISTENT_CLASS_NAME = "error/NonExistentClass"