diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8b9f6cae938e98090a8850ba31a8aaf24cc1a1c7..9b648bd63451dd81026649f244a6f8ae0d4b0699 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1079,7 +1079,7 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss,
 	 * Only thread group leaders are allowed to migrate, the mm_struct is
 	 * in effect owned by the leader
 	 */
-	if (p->tgid != p->pid)
+	if (!thread_group_leader(p))
 		goto out;
 
 	css_get(&mem->css);