diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 880572ba515a..817f55f3a19e 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -544,7 +544,7 @@ static const struct device_type nvmem_provider_type = {
 	.release	= nvmem_release,
 };
 
-static struct bus_type nvmem_bus_type = {
+static const struct bus_type nvmem_bus_type = {
 	.name		= "nvmem",
 };