--- origsrc/Python-2.6.5/Modules/selectmodule.c	2009-10-27 15:39:53.000000000 +0000
+++ src/Python-2.6.5/Modules/selectmodule.c	2011-03-14 18:25:48.859375000 +0000
@@ -6,6 +6,21 @@
    >= 0.
 */
 
+/* Windows #defines FD_SETSIZE to 64 if FD_SETSIZE isn't already defined.
+   64 is too small (too many people have bumped into that limit).
+   Here we boost it.
+
+   Cygwin also defines FD_SETSIZE to 64, so also increase the limit on
+   Cygwin.  We must do this before sys/types.h is included, which otherwise
+   sets FD_SETSIZE to the default.
+
+   Users who want even more than the boosted limit should #define
+   FD_SETSIZE higher before this; e.g., via compiler /D switch.
+*/
+#if (defined(MS_WINDOWS) || defined(__CYGWIN__)) && !defined(FD_SETSIZE)
+#define FD_SETSIZE 512
+#endif
+
 #include "Python.h"
 #include <structmember.h>
 
@@ -16,16 +31,6 @@
 #undef HAVE_BROKEN_POLL
 #endif
 
-/* Windows #defines FD_SETSIZE to 64 if FD_SETSIZE isn't already defined.
-   64 is too small (too many people have bumped into that limit).
-   Here we boost it.
-   Users who want even more than the boosted limit should #define
-   FD_SETSIZE higher before this; e.g., via compiler /D switch.
-*/
-#if defined(MS_WINDOWS) && !defined(FD_SETSIZE)
-#define FD_SETSIZE 512
-#endif 
-
 #if defined(HAVE_POLL_H)
 #include <poll.h>
 #elif defined(HAVE_SYS_POLL_H)