diff --git a/engine/client/cl_main.c b/engine/client/cl_main.c
index 301ac1460..dee80ae90 100644
--- a/engine/client/cl_main.c
+++ b/engine/client/cl_main.c
@@ -23,11 +23,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "quakedef.h"
 #include "winquake.h"
 #include <sys/types.h>
-#ifdef _WIN32
-#include "winsock.h"
-#else
-#include <netinet/in.h>
-#endif
+#include "netinc.h"
 
 #if defined(_WIN32) && !defined(MINGW) && defined(RGLQUAKE)
 #define WINAVI
diff --git a/engine/common/netinc.h b/engine/common/netinc.h
index 854f0855f..cf3e8f1be 100644
--- a/engine/common/netinc.h
+++ b/engine/common/netinc.h
@@ -23,6 +23,7 @@
 	#include <sys/types.h>
 	#include <sys/socket.h>
 	#include <netinet/in.h>
+	#include <netinet/tcp.h>
 	#include <netdb.h>
 	#include <sys/param.h>
 	#include <sys/ioctl.h>