diff --git a/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/id/IdTableBuilding.java b/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/id/IdTableBuilding.java
index 0f7a4a0f6ccb..36c1b2f7007a 100644
--- a/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/id/IdTableBuilding.java
+++ b/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/id/IdTableBuilding.java
@@ -108,7 +108,7 @@ public class IdTableBuilding {
 
   }
 
-  private static class WordsScannerFileTypeIdIndexerAdapter extends FileTypeIdIndexer {
+  private static class WordsScannerFileTypeIdIndexerAdapter implements IdIndexer {
     private final WordsScanner myScanner;
 
     public WordsScannerFileTypeIdIndexerAdapter(@NotNull final WordsScanner scanner) {