diff --git a/java/java-psi-impl/src/com/intellij/psi/impl/TypeCorrector.java b/java/java-psi-impl/src/com/intellij/psi/impl/TypeCorrector.java
index a86aff429b91..47dde1167742 100644
--- a/java/java-psi-impl/src/com/intellij/psi/impl/TypeCorrector.java
+++ b/java/java-psi-impl/src/com/intellij/psi/impl/TypeCorrector.java
@@ -159,7 +159,7 @@ class TypeCorrector extends PsiTypeMapper {
         @Override
         public PsiType fun(PsiType type) {
           if (type == null) {
-            LOG.error(myDelegate);
+            LOG.error(myDelegate + " of " + myDelegate.getClass() + "; substitutor=" + myDelegate.resolveGenerics().getSubstitutor());
             return null;
           }
           return mapType(type);