diff --git a/customize.html b/customize.html
index 35d74354e8..53ed8d710f 100644
--- a/customize.html
+++ b/customize.html
@@ -56,7 +56,7 @@ base_url: "../"
         </div>
         <div class="checkbox">
           <label>
-            <input type="checkbox" checked value="buttons.less">
+            <input type="checkbox" checked value="buttons.less" data-dependents="button-groups.less">
             Buttons
           </label>
         </div>