diff --git a/win/rfb_win32/ScaledDIBSectionBuffer.h b/win/rfb_win32/ScaledDIBSectionBuffer.h
index 509411c..8221593 100644
--- a/win/rfb_win32/ScaledDIBSectionBuffer.h
+++ b/win/rfb_win32/ScaledDIBSectionBuffer.h
@@ -51,6 +51,7 @@
       virtual const PixelFormat& getScaledPixelFormat() const { return getPF(); }
       virtual void setSize(int w, int h);
       virtual void setScale(int scale);
+      virtual void setScaleWindowSize(int width, int height);
       
       virtual void calculateScaledBufferSize();