diff --git a/core/java/android/view/IWindowSession.aidl b/core/java/android/view/IWindowSession.aidl
index caab00c..775ec99 100644
--- a/core/java/android/view/IWindowSession.aidl
+++ b/core/java/android/view/IWindowSession.aidl
@@ -300,5 +300,5 @@
     /**
      * 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);
 }