diff --git a/rhodecode/public/css/diff.less b/rhodecode/public/css/diff.less
--- a/rhodecode/public/css/diff.less
+++ b/rhodecode/public/css/diff.less
@@ -33,6 +33,8 @@ div.diffblock.margined.comm tr {
 
     .comment-toggle {
         position: relative;
+        min-width: 20px;
+        width: 20px;
         color: @rcblue;
 
         .icon-comment {