diff --git a/conf/machine/beagleboard.conf b/conf/machine/beagleboard.conf
index bd2b8dd8..177820a5 100644
--- a/conf/machine/beagleboard.conf
+++ b/conf/machine/beagleboard.conf
@@ -31,6 +31,8 @@ UBOOT_MACHINE = "omap3_beagle_config"
 # UBI: logical eraseblock size:    129024 bytes
 # from ubiattach stdout:
 # UBI device number 0, total 1996 LEBs
+# 
+# Beagleboard C5 has 3998 LEBS (490MiB)
 MKUBIFS_ARGS = "-m 2048 -e 129024 -c 1996"
 
 # do ubiattach /dev/ubi_ctrl -m 4