diff --git a/static/editor.less b/static/editor.less
index 6241a0224..26d96c0e8 100644
--- a/static/editor.less
+++ b/static/editor.less
@@ -53,7 +53,7 @@
 }
 
 .editor .fold-marker:after {
-  .icon(0.8em);
+  .icon(0.8em, inline);
   content: @ellipsis;
   padding-left: 0.2em;
   position: relative;
diff --git a/static/octicon-mixins.less b/static/octicon-mixins.less
index 3264487e0..7b5f27f93 100644
--- a/static/octicon-mixins.less
+++ b/static/octicon-mixins.less
@@ -1,15 +1,12 @@
-.icon() {
+.icon(@size, @display: inline-block) {
   font-family: 'Octicons Regular';
   font-weight: normal;
   font-style: normal;
-  display: inline-block;
+  display: @display;
   line-height: 1;
   -webkit-font-smoothing: antialiased;
   text-decoration: none;
-}
 
-.icon(@size) {
-  .icon;
   font-size: @size;
   width: @size;
   height: @size;