diff --git a/vnc.html b/vnc.html
index 25eeeac6..4afaed73 100644
--- a/vnc.html
+++ b/vnc.html
@@ -228,7 +228,7 @@
             <!-- Toggle fullscreen -->
             <input type="image" alt="Fullscreen" src="app/images/fullscreen.svg"
                    id="noVNC_fullscreen_button" class="noVNC_button noVNC_hidden"
-                   title="Fullscreen">
+                   title="Fullscreen (F11)">
 
             <!-- Settings -->
             <input style="display: none" type="image" alt="Settings" src="app/images/settings.svg"