diff -urN a/Modules/_ssl.c b/Modules/_ssl.c
--- a/Modules/_ssl.c	2013-10-20 19:29:32.975304600 +0100
+++ b/Modules/_ssl.c	2013-10-20 19:30:00.858899500 +0100
@@ -16,6 +16,10 @@
 
 #include "Python.h"
 
+#ifdef __CYGWIN__
+#undef WITH_THREAD
+#endif
+
 #ifdef WITH_THREAD
 #include "pythread.h"
 #define PySSL_BEGIN_ALLOW_THREADS { \