diff --git a/winsup/cygwin/include/netinet/tcp.h b/winsup/cygwin/include/netinet/tcp.h
new file mode 100644
index 000000000..b3401cd3b
--- /dev/null
+++ b/winsup/cygwin/include/netinet/tcp.h
@@ -0,0 +1,6 @@
+#ifndef _NETINET_TCP_H
+#define _NETINET_TCP_H
+
+#include <winsock.h>
+
+#endif