diff --git a/configs/gdppc440etx_defconfig b/configs/gdppc440etx_defconfig
index 3fc9261..2a5a484 100644
--- a/configs/gdppc440etx_defconfig
+++ b/configs/gdppc440etx_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_4xx=y
 CONFIG_TARGET_GDPPC440ETX=y
 CONFIG_OF_BOARD_SETUP=y