diff --git a/include/ui/ISurface.h b/include/ui/ISurface.h
index adba45a..7909c2f 100644
--- a/include/ui/ISurface.h
+++ b/include/ui/ISurface.h
@@ -50,7 +50,7 @@
 public: 
     DECLARE_META_INTERFACE(Surface);
 
-    virtual sp<SurfaceBuffer> getBuffer() = 0; 
+    virtual sp<SurfaceBuffer> getBuffer(int usage) = 0; 
     
     class BufferHeap {
     public: