diff --git a/vncviewer/DesktopWindow.cxx b/vncviewer/DesktopWindow.cxx
index eee55ff..e49b725 100644
--- a/vncviewer/DesktopWindow.cxx
+++ b/vncviewer/DesktopWindow.cxx
@@ -298,7 +298,7 @@
 {
   showToolbar = st;
 
-  if (showToolbar && !tb.isVisible()) {
+  if (showToolbar && !tb.isVisible() && !fullscreenActive) {
     tb.show();
   } else if (!showToolbar && tb.isVisible()) {
     tb.hide();