diff --git a/tmate-proxy.c b/tmate-proxy.c
index c3e45768..89d06bea 100644
--- a/tmate-proxy.c
+++ b/tmate-proxy.c
@@ -2,6 +2,9 @@
 #include <netinet/tcp.h>
 #include <fcntl.h>
 #include <errno.h>
+#ifndef IPPROTO_TCP
+#include <netinet/in.h>
+#endif
 
 #include "tmate.h"
 #include "tmate-protocol.h"
diff --git a/tmate-ssh-server.c b/tmate-ssh-server.c
index 215b377d..b81186ed 100644
--- a/tmate-ssh-server.c
+++ b/tmate-ssh-server.c
@@ -8,6 +8,9 @@
 #include <stdio.h>
 #include <event.h>
 #include <arpa/inet.h>
+#ifndef IPPROTO_TCP
+#include <netinet/in.h>
+#endif
 
 #include "tmate.h"