diff --git a/application/controllers/admin/update.php b/application/controllers/admin/update.php
index 91e493aec5b..5e5e586682c 100644
--- a/application/controllers/admin/update.php
+++ b/application/controllers/admin/update.php
@@ -153,12 +153,15 @@ function step2()
         $updatebuild = getGlobalSetting("updatebuild");
         list($error, $updateinfo, $cookies) = $this->_getChangedFiles($buildnumber, $updatebuild);
         $aData = $this->_getFileStatus($updateinfo);
-        foreach (array_unique($aData['readonlyfiles']) as $aFile)
+        if(count($aData['readonlyfiles']))
         {
-            $aReadOnlyFiles[]=substr($aFile,strlen(Yii::app()->getConfig("rootdir")));  
-        };
-        sort($aReadOnlyFiles);
-        $aData['readonlyfiles']=$aReadOnlyFiles;
+            foreach (array_unique($aData['readonlyfiles']) as $aFile)
+            {
+                $aReadOnlyFiles[]=substr($aFile,strlen(Yii::app()->getConfig("rootdir")));
+            }
+            sort($aReadOnlyFiles);
+            $aData['readonlyfiles']=$aReadOnlyFiles;
+        }
         Yii::app()->session['updateinfo'] = $updateinfo;
         Yii::app()->session['updatesession'] = $cookies;