diff --git a/configs/rockpro64-rk3399_defconfig b/configs/rockpro64-rk3399_defconfig
index 867f2e1..7ad985f 100644
--- a/configs/rockpro64-rk3399_defconfig
+++ b/configs/rockpro64-rk3399_defconfig
@@ -40,7 +40,7 @@ CONFIG_CMD_MMC=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_MASS_STORAGE=y
-# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_MTDPARTS=y