diff --git a/extensions/mentions/less/forum.less b/extensions/mentions/less/forum.less
index 12ac35b0e..abd0b19a3 100644
--- a/extensions/mentions/less/forum.less
+++ b/extensions/mentions/less/forum.less
@@ -91,7 +91,8 @@
   position: absolute;
   .Button--color(@tooltip-color, @tooltip-bg);
 }
-@media screen and (max-width: @screen-phone-max) {
+
+@media @phone {
   .MentionsDropdown {
     max-width: 100%;
   }