diff --git a/configs/PLU405_defconfig b/configs/PLU405_defconfig
index 3ff7c85..fe26fed 100644
--- a/configs/PLU405_defconfig
+++ b/configs/PLU405_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_4xx=y
 CONFIG_TARGET_PLU405=y
 CONFIG_OF_BOARD_SETUP=y