diff --git a/nmrp.c b/nmrp.c
index a25a78a..4501d63 100644
--- a/nmrp.c
+++ b/nmrp.c
@@ -235,6 +235,8 @@ static void msg_mkconfack(struct nmrp_msg *msg, uint32_t ipaddr, uint32_t ipmask
 #define ethsock_recv(sock, buf, len) read(STDIN_FILENO, buf, len)
 #define ethsock_send(a, b, c) (0)
 #define ethsock_set_timeout(a, b) (0)
+#define ethsock_arp_add(a, b, c, d) (0)
+#define ethsock_arp_del(a, b) (0)
 #define ethsock_ip_add(a, b, c, d) (0)
 #define ethsock_ip_del(a, b) (0)
 #define ethsock_close(a) (0)
diff --git a/tftp.c b/tftp.c
index bf74650..5189cbf 100644
--- a/tftp.c
+++ b/tftp.c
@@ -273,6 +273,10 @@ static ssize_t tftp_sendto(int sock, char *pkt, size_t len,
 
 const char *leafname(const char *path)
 {
+	if (!path) {
+		return NULL;
+	}
+
 	const char *slash, *bslash;
 
 	slash = strrchr(path, '/');