diff --git a/configs/wtk_defconfig b/configs/wtk_defconfig
index f98be1f..fa2eea0 100644
--- a/configs/wtk_defconfig
+++ b/configs/wtk_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_8xx=y
 CONFIG_TARGET_TQM823L=y
 CONFIG_OF_BOARD_SETUP=y