diff --git a/workflow/engine/controllers/adminProxy.php b/workflow/engine/controllers/adminProxy.php
index 4979ad2c9..9cd1b2ce2 100644
--- a/workflow/engine/controllers/adminProxy.php
+++ b/workflow/engine/controllers/adminProxy.php
@@ -1009,7 +1009,6 @@ class adminProxy extends HttpProxyController
     public function uploadImage()
     {
         //!dataSystem
-        
         G::LoadSystem('inputfilter');
         $filter = new InputFilter();
         $_SERVER["REQUEST_URI"] = $filter->xssFilterHard($_SERVER["REQUEST_URI"]);
@@ -1090,7 +1089,13 @@ class adminProxy extends HttpProxyController
         $uploaded = $filter->validateInput($uploaded,'int');
         $files_img_type = $filter->xssFilterHard($files_img_type);
         $failed = $filter->validateInput($failed,'int');
-        echo '{success: true, failed: ' . $failed . ', uploaded: ' . $uploaded . ', type: "' . $files_img_type . '"}';
+        $resp = array(
+            'success'   => true,
+            'failed'    => $failed,
+            'uploaded'  => $uploaded,
+            'type'      => $files_img_type
+        );
+        echo json_encode($resp);
         exit();
     }
 
diff --git a/workflow/engine/templates/admin/pmLogo.js b/workflow/engine/templates/admin/pmLogo.js
index 0da25c7c1..fe349cec2 100644
--- a/workflow/engine/templates/admin/pmLogo.js
+++ b/workflow/engine/templates/admin/pmLogo.js
@@ -257,7 +257,7 @@ Ext.onReady(function() {
             waitTitle : " ",
             success : function(form, o) {
               obj = Ext.util.JSON.decode(o.response.responseText);
-              if (obj.failed == '0' && obj.uploaded != '0') {
+              if ((obj.failed == '' || obj.failed == '0') && obj.uploaded != '0') {
                 PMExt.notify(_('ID_SUCCESS'), _('ID_YOUR_IMAGE_HAS_BEEN_SUCCESSFULLY'));
               }
               else {