diff --git a/configs/qemu-ppce500_defconfig b/configs/qemu-ppce500_defconfig
index c3df65a..6413567 100644
--- a/configs/qemu-ppce500_defconfig
+++ b/configs/qemu-ppce500_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_MPC85xx=y
 CONFIG_TARGET_QEMU_PPCE500=y
 CONFIG_FIT=y