diff --git a/platform/core-api/src/com/intellij/openapi/project/DumbModeTask.java b/platform/core-api/src/com/intellij/openapi/project/DumbModeTask.java
index ab9238f27b3d..64a52369c072 100644
--- a/platform/core-api/src/com/intellij/openapi/project/DumbModeTask.java
+++ b/platform/core-api/src/com/intellij/openapi/project/DumbModeTask.java
@@ -14,14 +14,6 @@ import org.jetbrains.annotations.NotNull;
 public abstract class DumbModeTask implements Disposable {
   private final Object myEquivalenceObject;
 
-  /**
-   * @deprecated using of that constructor likely disables merging
-   * of similar tasks in the {@link DumbService#queueTask(DumbModeTask)}.
-   * Use the {@link DumbModeTask#DumbModeTask(Object)} to specify equivalence
-   * clearly.
-   * @see #getEquivalenceObject() for details
-   */
-  @Deprecated
   public DumbModeTask() {
     myEquivalenceObject = this;
   }
diff --git a/platform/lang-impl/src/com/intellij/util/indexing/UnindexedFilesUpdater.java b/platform/lang-impl/src/com/intellij/util/indexing/UnindexedFilesUpdater.java
index 9cbe73e8165a..c10fded961cb 100644
--- a/platform/lang-impl/src/com/intellij/util/indexing/UnindexedFilesUpdater.java
+++ b/platform/lang-impl/src/com/intellij/util/indexing/UnindexedFilesUpdater.java
@@ -55,7 +55,7 @@ public final class UnindexedFilesUpdater extends DumbModeTask {
   private final PushedFilePropertiesUpdater myPusher;
 
   public UnindexedFilesUpdater(@NotNull Project project, boolean startSuspended) {
-    super(project);
+    // should not provide equivalence object
     myProject = project;
     myStartSuspended = startSuspended;
     myPusher = PushedFilePropertiesUpdater.getInstance(myProject);