diff --git a/include/surfaceflinger/SurfaceComposerClient.h b/include/surfaceflinger/SurfaceComposerClient.h
index 14e5b23..8226abe 100644
--- a/include/surfaceflinger/SurfaceComposerClient.h
+++ b/include/surfaceflinger/SurfaceComposerClient.h
@@ -112,7 +112,7 @@
     static void openGlobalTransaction();
         
     //! Close a composer transaction on all active SurfaceComposerClients.
-    static void closeGlobalTransaction();
+    static void closeGlobalTransaction(bool synchronous = false);
     
     //! Freeze the specified display but not transactions.
     static status_t freezeDisplay(DisplayID dpy, uint32_t flags = 0);