diff --git a/configs/mgcoge3un_defconfig b/configs/mgcoge3un_defconfig
index becc257..8179922 100644
--- a/configs/mgcoge3un_defconfig
+++ b/configs/mgcoge3un_defconfig
@@ -2,6 +2,7 @@
 CONFIG_KIRKWOOD=y
 CONFIG_TARGET_KM_KIRKWOOD=y
 CONFIG_IDENT_STRING="\nKeymile COGE3UN"
+# CONFIG_MMC is not set
 CONFIG_SYS_EXTRA_OPTIONS="KM_MGCOGE3UN"
 CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set