diff --git a/usr.bin/systat/tcp.c b/usr.bin/systat/tcp.c
index 8163028024f8..622d8bbe8498 100644
--- a/usr.bin/systat/tcp.c
+++ b/usr.bin/systat/tcp.c
@@ -46,6 +46,8 @@ static const char rcsid[] =
 #include <sys/socket.h>
 #include <sys/sysctl.h>
 
+#include <net/route.h>
+
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>