diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index dfe0f11271535c13aac5dd53679e4c50c9345d81..5082d0664adf7f621d791afb715955a05f0a1eba 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6277,8 +6277,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
 		goto fail;
 
 	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;