diff --git a/public/javascripts/attachments.js b/public/javascripts/attachments.js
index 260c060..5876800 100644
--- a/public/javascripts/attachments.js
+++ b/public/javascripts/attachments.js
@@ -141,7 +141,7 @@ function uploadAndAttachFiles(files, inputEl) {
 
   var sizeExceeded = false;
   $.each(files, function() {
-    if (this.size && maxFileSize && this.size > parseInt(maxFileSize)) {sizeExceeded=true;}
+    if (this.size && maxFileSize != null && this.size > parseInt(maxFileSize)) {sizeExceeded=true;}
   });
   if (sizeExceeded) {
     window.alert(maxFileSizeExceeded);