diff --git a/extensions/mentions/less/forum/extension.less b/extensions/mentions/less/forum/extension.less
index 576f1e365..217535183 100644
--- a/extensions/mentions/less/forum/extension.less
+++ b/extensions/mentions/less/forum/extension.less
@@ -69,6 +69,7 @@
 }
 .Post-mentionedBy {
   position: relative;
+  display: inline-block;
 }
 .Post-mentionedBy-summary {
   cursor: pointer;