diff --git a/include/surfaceflinger/ISurfaceComposer.h b/include/surfaceflinger/ISurfaceComposer.h
index ea022a6..26cf094 100644
--- a/include/surfaceflinger/ISurfaceComposer.h
+++ b/include/surfaceflinger/ISurfaceComposer.h
@@ -83,7 +83,11 @@
         eOrientationUnchanged   = 4,
         eOrientationSwapMask    = 0x01
     };
-    
+
+    enum {
+        eSynchronous            = 0x01,
+    };
+
     enum {
         eElectronBeamAnimationOn  = 0x01,
         eElectronBeamAnimationOff = 0x10
@@ -103,7 +107,7 @@
 
     /* open/close transactions. requires ACCESS_SURFACE_FLINGER permission */
     virtual void setTransactionState(const Vector<ComposerState>& state,
-            int orientation) = 0;
+            int orientation, uint32_t flags) = 0;
 
     /* signal that we're done booting.
      * Requires ACCESS_SURFACE_FLINGER permission
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);