diff --git a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexEx.java b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexEx.java
index 7380a0dac9b5..cc1780a2fec7 100644
--- a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexEx.java
+++ b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexEx.java
@@ -120,7 +120,8 @@ public abstract class FileBasedIndexEx extends FileBasedIndex {
       if (idFilter == null) {
         idFilter = projectIndexableFiles(scope.getProject());
       }
-      return index.processAllKeys(processor, scope, idFilter);
+      @Nullable IdFilter finalIdFilter = idFilter;
+      return myAccessValidator.validate(indexId, () -> index.processAllKeys(processor, scope, finalIdFilter));
     }
     catch (StorageException e) {
       scheduleRebuild(indexId, e);