diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefJavaManagerImpl.java b/java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefJavaManagerImpl.java
index fb10e25e4794..6808f59de20b 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefJavaManagerImpl.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefJavaManagerImpl.java
@@ -381,7 +381,7 @@ public class RefJavaManagerImpl extends RefJavaManager {
 
   @Override
   public boolean shouldProcessExternalFile(@NotNull PsiFile file) {
-    return false;
+    return file instanceof PsiClassOwner;
   }
 
   @NotNull