diff --git a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java
index 3ef57cafca3a..f2dad634cf9f 100644
--- a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java
+++ b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java
@@ -39,6 +39,10 @@ import java.util.Set;
 public abstract class FileBasedIndex implements ApplicationComponent {
   public abstract void iterateIndexableFiles(@NotNull ContentIterator processor, @NotNull Project project, ProgressIndicator indicator);
 
+  public abstract void registerIndexableSet(@NotNull IndexableFileSet set, @Nullable Project project);
+
+  public abstract void removeIndexableSet(@NotNull IndexableFileSet set);
+
   public static FileBasedIndex getInstance() {
     return ApplicationManager.getApplication().getComponent(FileBasedIndex.class);
   }
diff --git a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexImpl.java b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexImpl.java
index 29e82dd6d2a6..b6043d4bef02 100644
--- a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexImpl.java
+++ b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexImpl.java
@@ -2139,11 +2139,13 @@ public class FileBasedIndexImpl extends FileBasedIndex {
     return new UnindexedFilesFinder();
   }
 
+  @Override
   public void registerIndexableSet(@NotNull IndexableFileSet set, @Nullable Project project) {
     myIndexableSets.add(set);
     myIndexableSetToProjectMap.put(set, project);
   }
 
+  @Override
   public void removeIndexableSet(@NotNull IndexableFileSet set) {
     myChangedFilesCollector.forceUpdate(null, null, null, true);
     myIndexableSets.remove(set);