diff --git a/common/rfb/RawEncoder.h b/common/rfb/RawEncoder.h
index 22d45db..628f32f 100644
--- a/common/rfb/RawEncoder.h
+++ b/common/rfb/RawEncoder.h
@@ -26,7 +26,7 @@
   public:
     RawEncoder(SMsgWriter* writer);
     virtual ~RawEncoder();
-    virtual bool writeRect(const Rect& r, TransImageGetter* ig, Rect* actual);
+    virtual void writeRect(const Rect& r, TransImageGetter* ig);
   private:
     SMsgWriter* writer;
   };