diff --git a/pkg/emscripten/proto.html b/pkg/emscripten/proto.html
index c759e8174f..656ec7ffc3 100644
--- a/pkg/emscripten/proto.html
+++ b/pkg/emscripten/proto.html
@@ -94,7 +94,7 @@
                       <button class="btn btn-primary disabled" id="btnFullscreen" onclick="Module.requestFullScreen()" title="Fullscreen">
                          <span class="fa fa-desktop" id="icnAdd"></span> <span class="sr-only">Fullscreen</span>
                       </button>
-                      <button class="btn btn-primary" id="btnMenu" onclick="keyPress(112);">
+                      <button class="btn btn-primary" id="btnMenu" onclick="keyPress(112);" title="Menu toggle">
                         <span class="fa fa-bars" id="btnMenu"></span> <span class="sr-only">Menu</span>
                       </button>
                    </li>