diff --git a/platform/indexing-impl/src/com/intellij/psi/impl/search/LowLevelSearchUtil.java b/platform/indexing-impl/src/com/intellij/psi/impl/search/LowLevelSearchUtil.java
index a71bb105df3c..b796c46432d9 100644
--- a/platform/indexing-impl/src/com/intellij/psi/impl/search/LowLevelSearchUtil.java
+++ b/platform/indexing-impl/src/com/intellij/psi/impl/search/LowLevelSearchUtil.java
@@ -229,7 +229,8 @@ public class LowLevelSearchUtil {
     LOG.error(msg);
   }
 
-  private static final ConcurrentMap<CharSequence, Map<StringSearcher, int[]>> cache = ContainerUtil.createConcurrentWeakMap();
+  private static final ConcurrentMap<CharSequence, Map<StringSearcher, int[]>> cache =
+    ContainerUtil.createConcurrentWeakMap(ContainerUtil.identityStrategy());
   public static boolean processTextOccurrences(@NotNull CharSequence text,
                                                int startOffset,
                                                int endOffset,