diff --git a/os/osdep.h b/os/osdep.h
index 0a47997393..5ad759864c 100644
--- a/os/osdep.h
+++ b/os/osdep.h
@@ -127,7 +127,7 @@ extern Bool ComputeLocalClient(ClientPtr client);
 void TimerInit(void);
 Bool TimerForce(OsTimerPtr timer);
 
-#ifdef WIN32
+#if defined(WIN32) && !defined(__CYGWIN__)
 #include <X11/Xwinsock.h>
 struct utsname {
     char nodename[512];