diff --git a/cake/libs/model/datasources/dbo/dbo_mysql.php b/cake/libs/model/datasources/dbo/dbo_mysql.php
index 02aad8be9..edef55065 100644
--- a/cake/libs/model/datasources/dbo/dbo_mysql.php
+++ b/cake/libs/model/datasources/dbo/dbo_mysql.php
@@ -427,6 +427,9 @@ class DboMysql extends DboSource {
  * @param unknown_type $results
  */
 	function resultSet(&$results) {
+		if (isset($this->results) && is_resource($this->results) && $this->results != $results) {
+			mysql_free_result($this->results);
+		}		
 		$this->results =& $results;
 		$this->map = array();
 		$num_fields = mysql_num_fields($results);
diff --git a/cake/libs/model/datasources/dbo/dbo_mysqli.php b/cake/libs/model/datasources/dbo/dbo_mysqli.php
index 1c86366fe..d8e9af0f0 100644
--- a/cake/libs/model/datasources/dbo/dbo_mysqli.php
+++ b/cake/libs/model/datasources/dbo/dbo_mysqli.php
@@ -405,6 +405,9 @@ class DboMysqli extends DboSource {
  * @param unknown_type $results
  */
 	function resultSet(&$results) {
+		if (isset($this->results) && is_resource($this->results) && $this->results != $results) {
+			mysqli_free_result($this->results);
+		}
 		$this->results =& $results;
 		$this->map = array();
 		$num_fields = mysqli_num_fields($results);