diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/typedef/GrAnonymousClassDefinitionImpl.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/typedef/GrAnonymousClassDefinitionImpl.java
index 48da6aa8f275..035611935b20 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/typedef/GrAnonymousClassDefinitionImpl.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/typedef/GrAnonymousClassDefinitionImpl.java
@@ -52,7 +52,7 @@ public class GrAnonymousClassDefinitionImpl extends GrTypeDefinitionImpl impleme
   @NotNull
   public GrCodeReferenceElement getBaseClassReferenceGroovy() {
     //noinspection ConstantConditions
-    return findChildByClass(GrCodeReferenceElement.class); //not null because of definition =)
+    return findNotNullChildByClass(GrCodeReferenceElement.class); //not null because of definition =)
   }
 
   @Override