diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index fd40fef49e45ae4d2ed1fe4081f3a2acc2b7086d..b242f469e686a5b2f387013cec4aa6325feef6b7 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5349,8 +5349,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
 
 	memcg = &memcg_ext->memcg;
 	memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL,
-				 1, MEM_CGROUP_ID_MAX,
-				 GFP_KERNEL);
+				 1, MEM_CGROUP_ID_MAX + 1, GFP_KERNEL);
 	if (memcg->id.id < 0) {
 		error = memcg->id.id;
 		goto fail;