diff --git a/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFilesSearchScope.java b/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFilesSearchScope.java
index dd8923827d79..fb90279ce293 100644
--- a/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFilesSearchScope.java
+++ b/java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaFilesSearchScope.java
@@ -31,6 +31,8 @@ public class JavaFilesSearchScope extends GlobalSearchScope {
 
   @Override
   public boolean contains(@NotNull VirtualFile file) {
+    if (file.isDirectory())
+      return false;
     FileViewProvider viewProvider = myPsiManager.findViewProvider(file);
     return viewProvider != null && viewProvider.getLanguages().contains(JavaLanguage.INSTANCE);
   }