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 8dc14248eb9d..13dbb497f2db 100644
--- a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexEx.java
+++ b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexEx.java
@@ -429,6 +429,9 @@ public abstract class FileBasedIndexEx extends FileBasedIndex {
     List<IndexableFilesIterator> providers = getOrderedIndexableFilesProviders(project);
     IndexableFilesDeduplicateFilter indexableFilesDeduplicateFilter = IndexableFilesDeduplicateFilter.create();
     for (IndexableFilesIterator provider : providers) {
+      if (indicator != null) {
+        indicator.checkCanceled();
+      }
       if (!provider.iterateFiles(project, processor, indexableFilesDeduplicateFilter)) {
         break;
       }