diff --git a/mm/memory-tiers.c b/mm/memory-tiers.c
index 5462d9e3c84c..ed20f96bf89d 100644
--- a/mm/memory-tiers.c
+++ b/mm/memory-tiers.c
@@ -39,7 +39,7 @@ static LIST_HEAD(memory_tiers);
 static struct node_memory_type_map node_memory_types[MAX_NUMNODES];
 struct memory_dev_type *default_dram_type;
 
-static struct bus_type memory_tier_subsys = {
+static const struct bus_type memory_tier_subsys = {
 	.name = "memory_tiering",
 	.dev_name = "memory_tier",
 };