diff --git a/fs/udf/super.c b/fs/udf/super.c
index a1962c93bd26..9f2de5e7c6e1 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1160,7 +1160,7 @@ static int udf_fill_partdesc_info(struct super_block *sb,
 		map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
 		/* Check whether math over bitmap won't overflow. */
 		if (check_add_overflow(map->s_partition_len,
-				       sizeof(struct spaceBitmapDesc) << 3,
+				       (u32)(sizeof(struct spaceBitmapDesc) << 3),
 				       &sum)) {
 			udf_err(sb, "Partition %d is too long (%u)\n", p_index,
 				map->s_partition_len);