diff --git a/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java b/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java
index 7734d6b..a93d2b8 100644
--- a/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java
+++ b/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java
@@ -108,4 +108,9 @@
      * @param displayId display ID
      */
     void onDisplayReady(int displayId);
+
+    /**
+     * Notifies System UI whether the recents animation is running.
+     */
+    void onRecentsAnimationStateChanged(boolean running);
 }