diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 47de0f140ba6..ac84854c85d7 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -366,7 +366,7 @@ static int cpu_uevent(const struct device *dev, struct kobj_uevent_env *env)
 }
 #endif
 
-struct bus_type cpu_subsys = {
+const struct bus_type cpu_subsys = {
 	.name = "cpu",
 	.dev_name = "cpu",
 	.match = cpu_subsys_match,
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index dcb89c987164..0b993a140946 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -128,7 +128,7 @@ static inline void cpu_maps_update_done(void)
 static inline int add_cpu(unsigned int cpu) { return 0;}
 
 #endif /* CONFIG_SMP */
-extern struct bus_type cpu_subsys;
+extern const struct bus_type cpu_subsys;
 
 extern int lockdep_is_cpus_held(void);