diff --git a/workflow/engine/classes/class.derivation.php b/workflow/engine/classes/class.derivation.php
index 794ab8742..681ed9252 100755
--- a/workflow/engine/classes/class.derivation.php
+++ b/workflow/engine/classes/class.derivation.php
@@ -195,7 +195,11 @@ class Derivation
 
                     $pmScript = new PMScript();
                     $pmScript->setFields($arrayApplicationData["APP_DATA"]);
-                    $pmScript->setScript($arrayRouteData["ROU_CONDITION"]);
+                    if(preg_match('/\b(or|and|xor)\b/i' , $arrayRouteData["ROU_CONDITION"])) {
+                        $pmScript->setScript("( ".$arrayRouteData["ROU_CONDITION"]." )");
+                    } else {
+                        $pmScript->setScript($arrayRouteData["ROU_CONDITION"]);
+                    } 
                     $flagContinue = $pmScript->evaluate();
                 }