diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 3ea38f0..a51c804 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -418,6 +418,8 @@
         return mFlinger->getFrameTimestamps(*this, frameNumber, outTimestamps);
     }
 
+    bool getTransformToDisplayInverse() const;
+
 protected:
     // constant
     sp<SurfaceFlinger> mFlinger;