diff --git a/configs/kmsuv31_defconfig b/configs/kmsuv31_defconfig
index 81b98db..7708b11 100644
--- a/configs/kmsuv31_defconfig
+++ b/configs/kmsuv31_defconfig
@@ -2,6 +2,7 @@
 CONFIG_KIRKWOOD=y
 CONFIG_TARGET_KM_KIRKWOOD=y
 CONFIG_IDENT_STRING="\nKeymile SUV31"
+# CONFIG_MMC is not set
 CONFIG_SYS_EXTRA_OPTIONS="KM_SUV31"
 CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set