diff -Naur Python-3.6.5-orig/Include/osdefs.h Python-3.6.5/Include/osdefs.h
--- Python-3.6.5-orig/Include/osdefs.h	2018-04-16 09:54:05.811662600 +0300
+++ Python-3.6.5/Include/osdefs.h	2018-04-16 09:54:37.731375600 +0300
@@ -10,7 +10,6 @@
 #ifdef MS_WINDOWS
 #define SEP L'\\'
 #define ALTSEP L'/'
-#define MAXPATHLEN 256
 #define DELIM L';'
 #define DELIMSTR L";"
 #endif