diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index fd02d0d..1d1c87d 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -161,7 +161,9 @@
 #undef CONFIG_CMD_NET
 #undef CONFIG_CMD_NFS
 
+#ifndef CONFIG_CONS_INDEX
 #define CONFIG_CONS_INDEX              1       /* UART0 */
+#endif
 
 #ifdef CONFIG_SUNXI_GMAC
 #define CONFIG_DESIGNWARE_ETH		/* GMAC can use designware driver */