diff --git a/include/configs/tinker_rk3288.h b/include/configs/tinker_rk3288.h
index 5adae68c91..32057b3dbb 100644
--- a/include/configs/tinker_rk3288.h
+++ b/include/configs/tinker_rk3288.h
@@ -18,5 +18,6 @@
 	func(DHCP, dchp, na)
 
 #define CONFIG_SYS_MMC_ENV_DEV 1
+#define CONFIG_SYS_MONITOR_LEN (600 * 1024)
 
 #endif