diff --git a/test/unit/core/test_mem.c b/test/unit/core/test_mem.c
index 98b29d2a..10574c05 100644
--- a/test/unit/core/test_mem.c
+++ b/test/unit/core/test_mem.c
@@ -92,6 +92,7 @@ START_TEST(test_mem_random)
   int x;
   int size;
   int freestep;
+  LWIP_UNUSED_ARG(_i);
 
   fail_unless(lwip_stats.mem.used == 0);
 
diff --git a/test/unit/tcp/tcp_helper.c b/test/unit/tcp/tcp_helper.c
index ff503db3..f3b98be9 100644
--- a/test/unit/tcp/tcp_helper.c
+++ b/test/unit/tcp/tcp_helper.c
@@ -256,7 +256,7 @@ void test_tcp_input(struct pbuf *p, struct netif *inp)
 }
 
 static err_t test_tcp_netif_output(struct netif *netif, struct pbuf *p,
-       ip_addr_t *ipaddr)
+       const ip_addr_t *ipaddr)
 {
   struct test_tcp_txcounters *txcounters = (struct test_tcp_txcounters*)netif->state;
   LWIP_UNUSED_ARG(ipaddr);