diff --git a/common/rfb/VNCSConnectionST.h b/common/rfb/VNCSConnectionST.h
index c1750b9..c9e4ac8 100644
--- a/common/rfb/VNCSConnectionST.h
+++ b/common/rfb/VNCSConnectionST.h
@@ -63,6 +63,7 @@
 
     void writeFramebufferUpdateOrClose();
     void pixelBufferChange();
+    void screenLayoutChange(rdr::U16 reason);
     void setColourMapEntriesOrClose(int firstColour, int nColours);
     void bell();
     void serverCutText(const char *str, int len);