diff --git a/platform/duplicates-analysis/src/com/intellij/dupLocator/index/DuplicatesIndex.java b/platform/duplicates-analysis/src/com/intellij/dupLocator/index/DuplicatesIndex.java
index bbe93618a4aa..cacbcf89aca0 100644
--- a/platform/duplicates-analysis/src/com/intellij/dupLocator/index/DuplicatesIndex.java
+++ b/platform/duplicates-analysis/src/com/intellij/dupLocator/index/DuplicatesIndex.java
@@ -113,7 +113,7 @@ public class DuplicatesIndex extends FileBasedIndexExtension<Integer, TIntArrayL
 
       MyFragmentsCollector collector = new MyFragmentsCollector(profile, ((LanguageFileType)type).getLanguage());
       DuplocateVisitor visitor = profile.createVisitor(collector, true);
-      visitor.visitNode(inputData.getPsiFile());
+      visitor.visitNode(((FileContentImpl)inputData).getPsiFileAccountingForUnsavedDocument());
 
       return collector.getMap();
     }