diff --git a/configs/puma-rk3399_defconfig b/configs/puma-rk3399_defconfig
index 89f1620..67d1615 100644
--- a/configs/puma-rk3399_defconfig
+++ b/configs/puma-rk3399_defconfig
@@ -13,6 +13,7 @@
 CONFIG_FIT=y
 CONFIG_SPL_LOAD_FIT=y
 CONFIG_SPL_FIT_SOURCE="board/theobroma-systems/puma_rk3399/fit_spl_atf.its"
+CONFIG_ENV_IS_IN_MMC=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_BOARD_INIT=y
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set