diff --git a/rhodecode/public/css/style.css b/rhodecode/public/css/style.css
--- a/rhodecode/public/css/style.css
+++ b/rhodecode/public/css/style.css
@@ -2820,6 +2820,13 @@ table.code-browser .submodule-dir {
 	box-shadow: 0 2px 2px rgba(0, 0, 0, 0.6);
 }
 
+.mentions-container{
+	width: 100% !important;
+}
+.mentions-container .yui-ac-content{
+	width: 90% !important;
+}
+
 .ac {
 	vertical-align: top;
 }