diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/FunctionCodegen.java b/compiler/backend/src/org/jetbrains/jet/codegen/FunctionCodegen.java
index 9f41c5bb90e..8f9b0ac2869 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/FunctionCodegen.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/FunctionCodegen.java
@@ -119,12 +119,13 @@ public class FunctionCodegen extends ParentCodegenAwareImpl {
         }
 
         AnnotationCodegen.forMethod(mv, typeMapper).genAnnotations(functionDescriptor);
-        if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
 
         generateParameterAnnotations(functionDescriptor, mv, jvmSignature);
 
         generateJetValueParameterAnnotations(mv, functionDescriptor, jvmSignature);
 
+        if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
+
         if (isAbstractMethod(functionDescriptor, methodContext.getContextKind())) return;
 
         generateMethodBody(mv, functionDescriptor, methodContext, jvmSignature, strategy);
@@ -210,7 +211,10 @@ public class FunctionCodegen extends ParentCodegenAwareImpl {
         }
     }
 
-    private static void markEnumConstructorParameterAsSynthetic(MethodVisitor mv, int i) {
+    private void markEnumConstructorParameterAsSynthetic(MethodVisitor mv, int i) {
+        // IDEA's ClsPsi builder fails to annotate synthetic parameters
+        if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
+
         // This is needed to avoid RuntimeInvisibleParameterAnnotations error in javac:
         // see MethodWriter.visitParameterAnnotation()