diff --git a/js/views/attachment_view.js b/js/views/attachment_view.js
index 506e831d92..df0325e1a8 100644
--- a/js/views/attachment_view.js
+++ b/js/views/attachment_view.js
@@ -30,7 +30,7 @@
         this.trigger('update');
       },
       render: function() {
-        if (this.source == null) {
+        if (this.source === null) {
           return this;
         }