diff --git a/drivers/md/dm-log-userspace-transfer.c b/drivers/md/dm-log-userspace-transfer.c
index 0ca1ee768a1fcf4ac0f995813e69485dad4b6d0f..8ce74d95ae4d9b9a47e8fa5a1389e87d71f46b0d 100644
--- a/drivers/md/dm-log-userspace-transfer.c
+++ b/drivers/md/dm-log-userspace-transfer.c
@@ -108,7 +108,7 @@ static int fill_pkg(struct cn_msg *msg, struct dm_ulog_request *tfr)
 				*(pkg->data_size) = 0;
 		} else if (tfr->data_size > *(pkg->data_size)) {
 			DMERR("Insufficient space to receive package [%u] "
-			      "(%u vs %lu)", tfr->request_type,
+			      "(%u vs %zu)", tfr->request_type,
 			      tfr->data_size, *(pkg->data_size));
 
 			*(pkg->data_size) = 0;