diff --git a/cake/libs/model/datasources/dbo_source.php b/cake/libs/model/datasources/dbo_source.php
index 0e559a374af..7064b464224 100755
--- a/cake/libs/model/datasources/dbo_source.php
+++ b/cake/libs/model/datasources/dbo_source.php
@@ -2328,7 +2328,7 @@ function order($keys, $direction = 'ASC', $model = null) {
  * @return mixed string condition or null
  * @access public
  */
-	function group($group, &$model = null) {
+	function group($group, $model = null) {
 		if ($group) {
 			if (is_array($group)) {
 				foreach($group as $index => $key) {