diff --git a/src/network/net_slirp.c b/src/network/net_slirp.c
index b18ac1240..e3899accb 100644
--- a/src/network/net_slirp.c
+++ b/src/network/net_slirp.c
@@ -469,14 +469,16 @@ net_slirp_in(uint8_t *pkt, int pkt_len)
 }
 
 
-/* Stub functions to stand in for the parts of libslirp we skip compiling. */
+/* Stubs to stand in for the parts of libslirp we skip compiling. */
 void ncsi_input(void *slirp, const uint8_t *pkt, int pkt_len) {}
 void ip6_init(void *slirp) {}
 void ip6_cleanup(void *slirp) {}
 void ip6_input(void *m) {}
+int ip6_output(void *so, void *m, int fast) { return 0; }
 void in6_compute_ethaddr(struct in6_addr ip, uint8_t *eth) {}
 bool in6_equal(const void *a, const void *b) { return 0; }
-int ip6_output(void *so, void *m, int fast) { return 0; }
+const struct in6_addr in6addr_any = { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } };
+const struct in6_addr in6addr_loopback = { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } };
 int udp6_output(void *so, void *m, void *saddr, void *daddr) { return 0; }
 void icmp6_send_error(void *m, uint8_t type, uint8_t code) {}
 void ndp_send_ns(void *slirp, struct in6_addr addr) {}