diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 83f0131..e162da6 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -1236,6 +1236,11 @@
     // janky frames there are.
     nsecs_t mMissedFrameJankStart = 0;
     int32_t mMissedFrameJankCount = 0;
+
+    // See updateInputWindowInfo() for details
+    std::atomic<bool> mInputDirty = true;
+    void dirtyInput() { mInputDirty = true; }
+    bool inputDirty() { return mInputDirty; }
 };
 
 } // namespace android