diff -Naur a/Modules/_ssl.c b/Modules/_ssl.c
--- a/Modules/_ssl.c	2014-05-31 22:58:40.000000000 +0400
+++ b/Modules/_ssl.c	2014-06-04 10:16:38.737000000 +0400
@@ -16,6 +16,10 @@
 
 #include "Python.h"
 
+#ifdef __CYGWIN__
+#undef WITH_THREAD
+#endif
+
 #ifdef WITH_THREAD
 #include "pythread.h"