diff --git a/workflow/engine/classes/model/Process.php b/workflow/engine/classes/model/Process.php
index 15160879d..a31f6f014 100755
--- a/workflow/engine/classes/model/Process.php
+++ b/workflow/engine/classes/model/Process.php
@@ -879,6 +879,9 @@ class Process extends BaseProcess
 
     public function ordProcessAsc ($a, $b)
     {
+    	if (($this->sort) == '')  {
+    		$this->sort = 'PRO_TITLE'; 
+    	}
         if ($a[$this->sort] > $b[$this->sort]) {
             return 1;
         } elseif ($a[$this->sort] < $b[$this->sort]) {
@@ -889,7 +892,10 @@ class Process extends BaseProcess
     }
 
     public function ordProcessDesc ($a, $b)
-    {
+    {
+    	if (($this->sort) == '')  {
+    		$this->sort = 'PRO_TITLE';
+    	}
 		if ($a[$this->sort] > $b[$this->sort]) {
 			return - 1;
 		} elseif ($a[$this->sort] < $b[$this->sort]) {