fix the curses module build failure on FreeBSD, reported in SF #740234.
diff --git a/Include/py_curses.h b/Include/py_curses.h
index 713a24f..3ecf48f 100644
--- a/Include/py_curses.h
+++ b/Include/py_curses.h
@@ -12,6 +12,21 @@
#endif
#endif
+#ifdef __FreeBSD__
+/*
+** On FreeBSD, [n]curses.h and stdlib.h/wchar.h use different guards
+** against multiple definition of wchar_t and wint_t.
+*/
+#ifdef _XOPEN_SOURCE_EXTENDED
+#ifndef _WCHAR_T
+#define _WCHAR_T
+#endif
+#ifndef _WINT_T
+#define _WINT_T
+#endif
+#endif
+#endif
+
#ifdef HAVE_NCURSES_H
#include <ncurses.h>
#else