diff --git a/www/index.html b/www/index.html
index ce280d63..25903e75 100644
--- a/www/index.html
+++ b/www/index.html
@@ -1260,7 +1260,7 @@
                     <div class="row">
                         <h4 class="panel-group-heading">Expert settings</h4>
                         <div class="panel panel-warning" id="defaultBehaviourssDiv">
-                            <div class="panel-heading">Modify default behavours</div>
+                            <div class="panel-heading">Modify default behaviours</div>
                             <div class="panel-body">
                                 <div class="column">
                                     <label class="checkbox" title="In some contexts, reloading the app will disconnect the currently loaded ZIM archive, requiring you to re-pick it. You may disable default interception here.">