diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index a8036a6..d7f005f 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -277,7 +277,7 @@
             void        handleWorkList();
             void        handleRepaint();
             void        postFramebuffer();
-            Region      setupHardwareComposer(const Region& dirty);
+            void        setupHardwareComposer(Region& dirtyInOut);
             void        composeSurfaces(const Region& dirty);
             void        repaintEverything();