Index: dlls/nsiproxy.sys/tcp.c
--- dlls/nsiproxy.sys/tcp.c.orig
+++ dlls/nsiproxy.sys/tcp.c
@@ -43,6 +43,8 @@
 #endif
 
 #ifdef HAVE_NETINET_IN_PCB_H
+#include <net/route.h>
+#include <netinet/ip.h>
 #include <netinet/in_pcb.h>
 #endif
 
@@ -55,6 +57,8 @@
 #endif
 
 #ifdef HAVE_NETINET_TCP_VAR_H
+#include <netinet/tcp.h>
+#include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 #endif