diff --git a/configs/Ainol_AW1_defconfig b/configs/Ainol_AW1_defconfig
index 94c5443..108e9fa 100644
--- a/configs/Ainol_AW1_defconfig
+++ b/configs/Ainol_AW1_defconfig
@@ -15,3 +15,4 @@
 CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-ainol-aw1"
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER"
+CONFIG_CMD_SETEXPR=y