diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 5818af8eca5a53..58eb7ca6569952 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -61,7 +61,6 @@ struct mem_cgroup_reclaim_cookie {
 #ifdef CONFIG_MEMCG
 
 #define MEM_CGROUP_ID_SHIFT	16
-#define MEM_CGROUP_ID_MAX	USHRT_MAX
 
 struct mem_cgroup_id {
 	int id;
@@ -1158,7 +1157,6 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
 #else /* CONFIG_MEMCG */
 
 #define MEM_CGROUP_ID_SHIFT	0
-#define MEM_CGROUP_ID_MAX	0
 
 static inline struct mem_cgroup *folio_memcg(struct folio *folio)
 {
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ab99503c9ff2d0..3eaeb69ef9f5f9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5155,6 +5155,7 @@ static struct cftype mem_cgroup_legacy_files[] = {
  * those references are manageable from userspace.
  */
 
+#define MEM_CGROUP_ID_MAX	((1UL << MEM_CGROUP_ID_SHIFT) - 1)
 static DEFINE_IDR(mem_cgroup_idr);
 
 static void mem_cgroup_id_remove(struct mem_cgroup *memcg)