diff --git a/net/lwip/dhcp.c b/net/lwip/dhcp.c
index b798014ebcb..731b57de3ba 100644
--- a/net/lwip/dhcp.c
+++ b/net/lwip/dhcp.c
@@ -30,9 +30,9 @@ static void call_lwip_dhcp_fine_tmr(void *ctx)
 
 static int dhcp_loop(struct udevice *udev)
 {
-	char ipstr[] = "ipaddr\0\0";
-	char maskstr[] = "netmask\0\0";
-	char gwstr[] = "gatewayip\0\0";
+	char ipstr[] = "ipaddr\0\0\0";
+	char maskstr[] = "netmask\0\0\0";
+	char gwstr[] = "gatewayip\0\0\0";
 	const ip_addr_t *ntpserverip;
 	unsigned long start;
 	struct netif *netif;
diff --git a/net/lwip/net-lwip.c b/net/lwip/net-lwip.c
index c325e923d20..0c83c004cab 100644
--- a/net/lwip/net-lwip.c
+++ b/net/lwip/net-lwip.c
@@ -103,9 +103,9 @@ struct netif *net_lwip_get_netif(void)
 static int get_udev_ipv4_info(struct udevice *dev, ip4_addr_t *ip,
 			      ip4_addr_t *mask, ip4_addr_t *gw)
 {
-	char ipstr[] = "ipaddr\0\0";
-	char maskstr[] = "netmask\0\0";
-	char gwstr[] = "gatewayip\0\0";
+	char ipstr[] = "ipaddr\0\0\0";
+	char maskstr[] = "netmask\0\0\0";
+	char gwstr[] = "gatewayip\0\0\0";
 	int idx = dev_seq(dev);
 	char *env;