diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index bd0a0b91d843..3468f25cb4b7 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -218,7 +218,7 @@ struct nvmet_subsys {
 
 	struct xarray		namespaces;
 	unsigned int		nr_namespaces;
-	unsigned int		max_nsid;
+	u32			max_nsid;
 	u16			cntlid_min;
 	u16			cntlid_max;