diff --git a/lib/ace/css/editor.css b/lib/ace/css/editor.css
index 749c4f6b..5057618f 100644
--- a/lib/ace/css/editor.css
+++ b/lib/ace/css/editor.css
@@ -33,7 +33,7 @@
     right: 0;
 }
 
-.ace_scroller.horscroll {
+.ace_scroller.ace_scroll-left {
     box-shadow: 17px 0 16px -16px rgba(0, 0, 0, 0.4) inset;
 }
 
diff --git a/lib/ace/virtual_renderer.js b/lib/ace/virtual_renderer.js
index 7fc408ae..026107c1 100644
--- a/lib/ace/virtual_renderer.js
+++ b/lib/ace/virtual_renderer.js
@@ -686,7 +686,7 @@ var VirtualRenderer = function(container, theme) {
             this.scrollLeft = scrollLeft;
             this.session.setScrollLeft(scrollLeft);
 
-            this.scroller.className = this.scrollLeft == 0 ? "ace_scroller" : "ace_scroller horscroll";
+            this.scroller.className = this.scrollLeft == 0 ? "ace_scroller" : "ace_scroller ace_scroll-left";
         }
 
         // full