diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php
index 11bb32fe07c..057e5a1d1c5 100644
--- a/system/libraries/Session/drivers/Session_cookie.php
+++ b/system/libraries/Session/drivers/Session_cookie.php
@@ -602,6 +602,9 @@ public function _update_db()
 				$set['user_data'] = $this->_serialize($userdata);
 			}
 
+			// Reset query builder values.
+			$this->CI->db->reset_query();
+
 			// Run the update query
 			// Any time we change the session id, it gets updated immediately,
 			// so our where clause below is always safe