diff --git a/configs/firefly-rk3399_defconfig b/configs/firefly-rk3399_defconfig
index 04fb3b7..da60eab 100644
--- a/configs/firefly-rk3399_defconfig
+++ b/configs/firefly-rk3399_defconfig
@@ -9,6 +9,7 @@
 CONFIG_DEBUG_UART=y
 CONFIG_FIT=y
 CONFIG_SPL_LOAD_FIT=y
+CONFIG_ENV_IS_IN_MMC=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x4000