diff --git a/disk/part_dos.c b/disk/part_dos.c
index b915eb7484d3f9b8c95553d5fb444c69af95a620..887b75ec8874fb409d08e2c13098fcd3cba9806c 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -188,7 +188,8 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
 		 * fdisk does not show the extended partitions that
 		 * are not in the MBR
 		 */
-		if ((pt->sys_ind != 0) &&
+		if (((pt->boot_ind & ~0x80) == 0) &&
+		    (pt->sys_ind != 0) &&
 		    (part_num == which_part) &&
 		    (is_extended(pt->sys_ind) == 0)) {
 			info->blksz = 512;