#4122: On Windows, Py_UNICODE_ISSPACE cannot be used in an extension module:
compilation fails with "undefined reference to _Py_ascii_whitespace"

Will backport to 2.6.
diff --git a/Misc/NEWS b/Misc/NEWS
index 3cfdc06..e583ff1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -36,6 +36,12 @@
 
 - Issue #3758: Add ``patchcheck`` build target to .PHONY.
 
+C-API
+-----
+
+- Issue #4122: On Windows, fix a compilation error when using the
+  Py_UNICODE_ISSPACE macro in an extension module.
+
 
 What's New in Python 2.6 final
 ==============================