diff --git a/sc2/src/sc2code/libs/network/socket/socket_bsd.c b/sc2/src/sc2code/libs/network/socket/socket_bsd.c
index 2bbff2861..a74093666 100644
--- a/sc2/src/sc2code/libs/network/socket/socket_bsd.c
+++ b/sc2/src/sc2code/libs/network/socket/socket_bsd.c
@@ -31,6 +31,9 @@
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <netdb.h>
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
+#	include <netinet/in_systm.h>
+#endif
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 #include <unistd.h>