diff --git a/sys/src/cmd/vnc/vncs.c b/sys/src/cmd/vnc/vncs.c
index efa1b996d..ef6965957 100644
--- a/sys/src/cmd/vnc/vncs.c
+++ b/sys/src/cmd/vnc/vncs.c
@@ -571,7 +571,7 @@ vncaccept(Vncs *v)
 	if(!shared)
 		killclients(v);
 
-	v->dim = rectsubpt(screen->r, screen->r.min);
+	v->dim = rectsubpt(gscreen->r, gscreen->r.min);
 	vncwrpoint(v, v->dim.max);
 	if(verbose)
 		fprint(2, "%V: send screen size %R\n", v, v->dim);