diff --git a/unix/vncviewer/CConn.cxx b/unix/vncviewer/CConn.cxx
index 79195a8..47ccbb2 100644
--- a/unix/vncviewer/CConn.cxx
+++ b/unix/vncviewer/CConn.cxx
@@ -273,8 +273,9 @@
 }
 
 // setExtendedDesktopSize() is a more advanced version of setDesktopSize()
-void CConn::setExtendedDesktopSize(int reason, int result, int w, int h) {
-  CConnection::setExtendedDesktopSize(reason, result, w,h);
+void CConn::setExtendedDesktopSize(int reason, int result, int w, int h,
+                                   const rfb::ScreenSet& layout) {
+  CConnection::setExtendedDesktopSize(reason, result, w, h, layout);
 
   if ((reason == reasonClient) && (result != resultSuccess))
     return;