diff --git a/session_api.module b/session_api.module
index ccbc39e..2109fe9 100644
--- a/session_api.module
+++ b/session_api.module
@@ -111,7 +111,7 @@ function session_api_cron() {
   }
   if (!empty($outdated_sids)) {
     module_invoke_all('session_api_cleanup', $outdated_sids);
-    db_query('DELETE FROM {session_api} WHERE sid IN (' . db_placeholders($outdated_sids, 'varchar') . ')');
+    db_query('DELETE FROM {session_api} WHERE sid IN (' . db_placeholders($outdated_sids, 'varchar') . ')', $outdated_sids);
   }
 }