diff --git a/configs/pengwyn_defconfig b/configs/pengwyn_defconfig
index 0f0fae8..3084b3b 100644
--- a/configs/pengwyn_defconfig
+++ b/configs/pengwyn_defconfig
@@ -7,6 +7,7 @@
 CONFIG_SPL_FAT_SUPPORT=y
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_SPL_LIBDISK_SUPPORT=y
+CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_ENV_SUPPORT=y
 CONFIG_VERSION_VARIABLE=y
 CONFIG_SPL=y