diff --git a/configs/edison_defconfig b/configs/edison_defconfig
index b55cc78..0aa7a45 100644
--- a/configs/edison_defconfig
+++ b/configs/edison_defconfig
@@ -24,6 +24,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_EMBED=y
+CONFIG_ENV_IS_IN_MMC=y
 CONFIG_CPU=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_RAM=y