diff --git a/ui/index.html b/ui/index.html
index b9d961df0d5e..a71d82395f02 100644
--- a/ui/index.html
+++ b/ui/index.html
@@ -558,7 +558,7 @@ <h3><translate key="label.select.iso.or.template" /></h3>
                                             <span><translate key="label.add.userdata"/> (<translate key="label.optional"/>)</span>
                                         </div>
                                         <div class="value">
-                                            <textarea name="userdata" class="disallowSpecialCharacters"></textarea>
+                                            <textarea name="userdata"></textarea>
                                         </div>
                                     </div>
                                 </div>
diff --git a/ui/scripts/instanceWizard.js b/ui/scripts/instanceWizard.js
index 351ca7b30208..1234cfa7de30 100644
--- a/ui/scripts/instanceWizard.js
+++ b/ui/scripts/instanceWizard.js
@@ -1094,8 +1094,9 @@
 
             var userdata = args.data.userdata;
             if (userdata != null && userdata.length > 0) {
+
                 $.extend(deployVmData, {
-                    userdata : encodeURIComponent(btoa(userdata))
+                    userdata : encodeURIComponent(btoa(cloudStack.sanitizeReverse(userdata)))
                 });
             }