diff --git a/doc/README.android-fastboot b/doc/README.android-fastboot
index dea7066..b8afa15 100644
--- a/doc/README.android-fastboot
+++ b/doc/README.android-fastboot
@@ -79,6 +79,7 @@
   * IDE, ATAPI and SATA disks: hd
   * SCSI disks: sd
   * USB media: usbd
+  * MMC and SD cards: mmcsd
   * Disk on chip: docd
   * other: xx