diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/generateJava8ParameterNames.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/generateJava8ParameterNames.kt
index 65813baeda3..9909747374c 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/generateJava8ParameterNames.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/generateJava8ParameterNames.kt
@@ -23,7 +23,7 @@ import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
 import org.jetbrains.org.objectweb.asm.MethodVisitor
 import org.jetbrains.org.objectweb.asm.Opcodes
 
-internal fun generateParameterNames(
+fun generateParameterNames(
         functionDescriptor: FunctionDescriptor,
         mv: MethodVisitor,
         jvmSignature: JvmMethodSignature,
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
index 33784786050..1ecd319eb24 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
@@ -48,6 +48,8 @@ open class FunctionCodegen(
         val flags = calculateMethodFlags(irFunction.isStatic)
         val methodVisitor = createMethod(flags, signature)
 
+        generateParameterNames(descriptor, methodVisitor, signature, state, flags.and(Opcodes.ACC_SYNTHETIC) != 0)
+
         if (irFunction.origin != IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER) {
             AnnotationCodegen(classCodegen, state, methodVisitor::visitAnnotation).genAnnotations(irFunction, signature.asmMethod.returnType)
             FunctionCodegen.generateParameterAnnotations(descriptor, methodVisitor, signature, DummyOldInnerClassConsumer(), state)
diff --git a/compiler/testData/codegen/box/parametersMetadata/delegation.kt b/compiler/testData/codegen/box/parametersMetadata/delegation.kt
index 285cd483ff1..d81430d184f 100644
--- a/compiler/testData/codegen/box/parametersMetadata/delegation.kt
+++ b/compiler/testData/codegen/box/parametersMetadata/delegation.kt
@@ -1,5 +1,4 @@
 // SKIP_JDK6
-// IGNORE_BACKEND: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt b/compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt
index 73729c5ccb5..4f76781e1c7 100644
--- a/compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt
+++ b/compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt
@@ -1,5 +1,4 @@
 // SKIP_JDK6
-// IGNORE_BACKEND: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/parametersMetadata/function.kt b/compiler/testData/codegen/box/parametersMetadata/function.kt
index 98eb36286f8..fb989de805a 100644
--- a/compiler/testData/codegen/box/parametersMetadata/function.kt
+++ b/compiler/testData/codegen/box/parametersMetadata/function.kt
@@ -1,5 +1,4 @@
 // SKIP_JDK6
-// IGNORE_BACKEND: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FULL_JDK