diff --git a/libsofia-sip-ua/tport/tport_type_sctp.c b/libsofia-sip-ua/tport/tport_type_sctp.c
index 5c8f6bdeaad884612195e125cb7fe063f8fde5a6..8c435293556a1583f22a1877ecd8f6072831767d 100644
--- a/libsofia-sip-ua/tport/tport_type_sctp.c
+++ b/libsofia-sip-ua/tport/tport_type_sctp.c
@@ -242,7 +242,7 @@ int tport_recv_sctp(tport_t *self)
     return 0;    /* End of stream */
   }
 
-  tport_recv_bytes(self, n, n);
+  tport_recv_bytes(self, N, N);
 
   veclen = tport_recv_iovec(self, &self->tp_msg, iovec, N, 0);
   if (veclen < 0)
diff --git a/libsofia-sip-ua/tport/tport_type_udp.c b/libsofia-sip-ua/tport/tport_type_udp.c
index d89bca23cbcd4dd8d336e30539c0c2cfaad29289..22ca6f71b3ee84e86949f57bddb7b87d33d572ba 100644
--- a/libsofia-sip-ua/tport/tport_type_udp.c
+++ b/libsofia-sip-ua/tport/tport_type_udp.c
@@ -114,7 +114,9 @@ int tport_udp_init_primary(tport_primary_t *pri,
   unsigned rmem = 0, wmem = 0;
   int events = SU_WAIT_IN;
   int s;
+#if HAVE_IP_ADD_MEMBERSHIP
   su_sockaddr_t *su = (su_sockaddr_t *)ai->ai_addr;
+#endif
   int const one = 1; (void)one;
 
   s = su_socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);