diff --git a/include/spdk/bdev.h b/include/spdk/bdev.h
index b7198ea327..e5e4f4cc1a 100644
--- a/include/spdk/bdev.h
+++ b/include/spdk/bdev.h
@@ -90,7 +90,7 @@ struct spdk_bdev {
 	int thin_provisioning;
 
 	/** function table for all LUN ops */
-	struct spdk_bdev_fn_table *fn_table;
+	const struct spdk_bdev_fn_table *fn_table;
 
 	/** Represents maximum unmap block descriptor count */
 	uint32_t max_unmap_bdesc_count;
diff --git a/lib/bdev/aio/blockdev_aio.c b/lib/bdev/aio/blockdev_aio.c
index ddfba25978..4f2251a7aa 100644
--- a/lib/bdev/aio/blockdev_aio.c
+++ b/lib/bdev/aio/blockdev_aio.c
@@ -288,7 +288,7 @@ blockdev_aio_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io
 	}
 }
 
-static struct spdk_bdev_fn_table aio_fn_table = {
+static const struct spdk_bdev_fn_table aio_fn_table = {
 	.destruct		= blockdev_aio_destruct,
 	.check_io		= blockdev_aio_check_io,
 	.submit_request		= blockdev_aio_submit_request,
diff --git a/lib/bdev/malloc/blockdev_malloc.c b/lib/bdev/malloc/blockdev_malloc.c
index 9ca3d13ff7..5d6081a150 100644
--- a/lib/bdev/malloc/blockdev_malloc.c
+++ b/lib/bdev/malloc/blockdev_malloc.c
@@ -266,7 +266,7 @@ blockdev_malloc_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type
 	}
 }
 
-static struct spdk_bdev_fn_table malloc_fn_table = {
+static const struct spdk_bdev_fn_table malloc_fn_table = {
 	.destruct		= blockdev_malloc_destruct,
 	.check_io		= blockdev_malloc_check_io,
 	.submit_request		= blockdev_malloc_submit_request,
diff --git a/lib/bdev/nvme/blockdev_nvme.c b/lib/bdev/nvme/blockdev_nvme.c
index a60c3ccfaf..de0daa4ad7 100644
--- a/lib/bdev/nvme/blockdev_nvme.c
+++ b/lib/bdev/nvme/blockdev_nvme.c
@@ -294,7 +294,7 @@ blockdev_nvme_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type i
 	}
 }
 
-static struct spdk_bdev_fn_table nvmelib_fn_table = {
+static const struct spdk_bdev_fn_table nvmelib_fn_table = {
 	.destruct		= blockdev_nvme_destruct,
 	.check_io		= blockdev_nvme_check_io,
 	.submit_request		= blockdev_nvme_submit_request,