Cleanup USB and partition defines
diff --git a/disk/part_dos.c b/disk/part_dos.c
index 49d4fc1..a37c32d 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -38,7 +38,8 @@
 #if ((CONFIG_COMMANDS & CFG_CMD_IDE)	|| \
      (CONFIG_COMMANDS & CFG_CMD_SCSI)	|| \
      (CONFIG_COMMANDS & CFG_CMD_USB)	|| \
-     (CONFIG_SYSTEMACE)) && defined(CONFIG_DOS_PARTITION)
+     defined(CONFIG_MMC) || \
+     defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_DOS_PARTITION)
 
 /* Convert char[4] in little endian format to the host format integer
  */