diff --git a/unix/x0vncserver/Geometry.h b/unix/x0vncserver/Geometry.h
index 98bafb2..d938d63 100644
--- a/unix/x0vncserver/Geometry.h
+++ b/unix/x0vncserver/Geometry.h
@@ -30,6 +30,7 @@
 {
 public:
   Geometry(int fullWidth, int fullHeight);
+  void recalc(int fullWidth, int fullHeight);
 
   // Return coordinates and dimensions that specify a rectangular part
   // of the desktop that would be shown to RFB clients. This