diff --git a/core/java/android/view/IWindowSession.aidl b/core/java/android/view/IWindowSession.aidl
index 4bfd1387bef4a..f73f28a943c38 100644
--- a/core/java/android/view/IWindowSession.aidl
+++ b/core/java/android/view/IWindowSession.aidl
@@ -308,7 +308,7 @@ interface IWindowSession {
     /**
      * Called when the system gesture exclusion has changed.
      */
-    void reportSystemGestureExclusionChanged(IWindow window, in List<Rect> exclusionRects);
+    oneway void reportSystemGestureExclusionChanged(IWindow window, in List<Rect> exclusionRects);
 
     /**
     * Request the server to call setInputWindowInfo on a given Surface, and return