diff --git a/configs/glacier_ramboot_defconfig b/configs/glacier_ramboot_defconfig
index 2d55ede..31c9d0b 100644
--- a/configs/glacier_ramboot_defconfig
+++ b/configs/glacier_ramboot_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_4xx=y
 CONFIG_TARGET_CANYONLANDS=y
 CONFIG_GLACIER=y