diff --git a/htdocs/index.html b/htdocs/index.html
index 34530e9..24caa5d 100644
--- a/htdocs/index.html
+++ b/htdocs/index.html
@@ -55,7 +55,7 @@
                         <div id="webrx-actual-freq">---.--- MHz</div>
                         <div id="webrx-mouse-freq">---.--- MHz</div>
                     </div>
-                    <div class="openwebrx-button openwebrx-square-button openwebrx-bookmark-button" style="display:none;">
+                    <div class="openwebrx-button openwebrx-square-button openwebrx-bookmark-button" style="display:none;" title="Add bookmark...">
                         <img src="static/gfx/openwebrx-bookmark.png">
                     </div>
                 </div>