diff --git a/lib/client/buffer.js b/lib/client/buffer.js
index bb830056..e8ad1f32 100644
--- a/lib/client/buffer.js
+++ b/lib/client/buffer.js
@@ -46,9 +46,11 @@
         function rmCutClass() {
             var files   = DOM.getByClassAll(CLASS);
             
-            [].forEach.call(files, function(element) {
-                element.classList.remove(CLASS);
-            });
+            []
+                .slice.call(files)
+                .forEach(function(element) {
+                    element.classList.remove(CLASS);
+                });
         }
         
         function isEnabled(callback) {