diff --git a/configs/katmai_defconfig b/configs/katmai_defconfig
index b2cfe83..703347e 100644
--- a/configs/katmai_defconfig
+++ b/configs/katmai_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_4xx=y
 CONFIG_TARGET_KATMAI=y
 CONFIG_OF_BOARD_SETUP=y