diff --git a/project/example_andlink/src/luat_andlink_ec618.c b/project/example_andlink/src/luat_andlink_ec618.c
index 4f56b0be..e9bca11e 100644
--- a/project/example_andlink/src/luat_andlink_ec618.c
+++ b/project/example_andlink/src/luat_andlink_ec618.c
@@ -37,7 +37,7 @@ int andlink_dn_send_cmd_callback(RESP_MODE_e mode, dn_dev_ctrl_frame_t *ctrlFram
 
 // 获取设备IP
 int andlink_get_device_ipaddr(char *ip, char *broadAddr){
-	char *ipaddr;
+	char *ipaddr = NULL;
 	ip_addr_t ipv4;
 	ip_addr_t ipv6;
 	while (luat_is_link_up == 0){
@@ -50,6 +50,9 @@ int andlink_get_device_ipaddr(char *ip, char *broadAddr){
 	if (ipv6.type != 0xff){
 		ipaddr = ip4addr_ntoa(&ipv4.u_addr.ip6);
 	}
+	if (ipaddr == NULL) {
+		return -1;
+	}
 	memcpy(ip, ipaddr, strlen(ipaddr));
 	return 0;
 }