diff --git a/platform/lang-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/CachingReference.java b/platform/lang-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/CachingReference.java
index 5f59d511a03b..11df25b5f1c3 100644
--- a/platform/lang-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/CachingReference.java
+++ b/platform/lang-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/CachingReference.java
@@ -51,7 +51,7 @@ public abstract class CachingReference implements PsiReference, EmptyResolveMess
   public static <T extends PsiElement> ElementManipulator<T> getManipulator(T currentElement){
     ElementManipulator<T> manipulator = ElementManipulators.getManipulator(currentElement);
     if (manipulator == null) {
-      throw new IncorrectOperationException("Manipulator for this element is not defined: " + currentElement);
+      throw new IncorrectOperationException("Manipulator for this element is not defined: " + currentElement + "; " + currentElement.getClass());
     }
     return manipulator;
   }