diff --git a/include/configs/evb_rk1808.h b/include/configs/evb_rk1808.h
index e2eb28768a..95731169ec 100644
--- a/include/configs/evb_rk1808.h
+++ b/include/configs/evb_rk1808.h
@@ -13,6 +13,8 @@
 			"stdout=serial,vidconsole\0" \
 			"stderr=serial,vidconsole\0"
 
+#define CONFIG_SYS_MMC_ENV_DEV		0
+
 #ifndef CONFIG_SPL_BUILD
 #undef CONFIG_BOOTCOMMAND
 #define CONFIG_BOOTCOMMAND RKIMG_BOOTCOMMAND