diff --git a/generator/lib/task/PropelSchemaReverseTask.php b/generator/lib/task/PropelSchemaReverseTask.php
index 948ba933b..40915e6a7 100644
--- a/generator/lib/task/PropelSchemaReverseTask.php
+++ b/generator/lib/task/PropelSchemaReverseTask.php
@@ -517,7 +517,7 @@ protected function getRuleMessage(Column $column, $type, $value)
         $msg = self::$validatorMessages[strtolower($type)];
         $tmp = compact($msg['var']);
         array_unshift($tmp, $msg['msg']);
-        $msg = call_user_func_array('sprintf', $tmp);
+        $msg = call_user_func_array('sprintf', array_values($tmp));
 
         return $msg;
     }