diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
index e8f58b3f5e..ca8978f0e1 100644
--- a/drivers/block/blk-uclass.c
+++ b/drivers/block/blk-uclass.c
@@ -580,6 +580,7 @@ int blk_create_device(struct udevice *parent, const char *drv_name,
 	desc = dev_get_uclass_platdata(dev);
 	desc->if_type = if_type;
 	desc->blksz = blksz;
+	desc->log2blksz = LOG2(desc->blksz);
 	desc->lba = lba;
 	desc->part_type = PART_TYPE_UNKNOWN;
 	desc->bdev = dev;