Enable CHECK_IMPORT_CASE on Win32.
diff --git a/PC/config.h b/PC/config.h
index 43ec3ec..5010cc0 100644
--- a/PC/config.h
+++ b/PC/config.h
@@ -195,6 +195,16 @@
#endif /* !MS_WIN16 */
#endif /* !MS_WIN32 */
+#ifdef MS_WIN32
+/* EXPERIMENTAL FEATURE: When CHECK_IMPORT_CASE is defined, check case of
+ imported modules against case of file; this causes "import String" to fail
+ with a NameError exception when it finds "string.py". Normally, you set
+ the environment variable PYTHONCASEOK (to anything) to disable this
+ feature; to permanently disable it, #undef it here. This only works on
+ case-preserving filesystems; otherwise you definitely want it off. */
+#define CHECK_IMPORT_CASE
+#endif
+
/* Fairly standard from here! */
/* Define if on AIX 3.