diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
index 2305a3cb..3ac20412 100644
--- a/src/core/tcp_in.c
+++ b/src/core/tcp_in.c
@@ -1058,7 +1058,9 @@ tcp_free_acked_segments(struct tcp_pcb *pcb, struct tcp_seg *seg_list, const cha
 static void
 tcp_receive(struct tcp_pcb *pcb)
 {
+#if TCP_QUEUE_OOSEQ || TCP_OOSEQ_MAX_BYTES || TCP_OOSEQ_MAX_PBUFS
   struct tcp_seg *next;
+#endif
 #if TCP_QUEUE_OOSEQ
   struct tcp_seg *prev, *cseg;
 #endif /* TCP_QUEUE_OOSEQ */
diff --git a/src/include/lwip/tcp.h b/src/include/lwip/tcp.h
index e5e05693..fac69505 100644
--- a/src/include/lwip/tcp.h
+++ b/src/include/lwip/tcp.h
@@ -390,7 +390,7 @@ void             tcp_backlog_accepted(struct tcp_pcb* pcb);
 #define          tcp_backlog_delayed(pcb)
 #define          tcp_backlog_accepted(pcb)
 #endif /* TCP_LISTEN_BACKLOG */
-#define          tcp_accepted(pcb) /* compatibility define, not needed any more */
+#define          tcp_accepted(pcb) { (void)pcb; } /* compatibility define, not needed any more */
 
 void             tcp_recved  (struct tcp_pcb *pcb, u16_t len);
 err_t            tcp_bind    (struct tcp_pcb *pcb, const ip_addr_t *ipaddr,