Building the _psp extension is done in the same way as buidling mod_p…

…ython.so.

dist/setup.py.in

@@ -100,10 +100,12 @@ class PSPExtension(Extension):
         Extension.__init__(self, "mod_python._psp",
                                [os.path.join(source_dir, source_file) for source_file in
                                     ("psp_string.c", "psp_parser.c", "_pspmodule.c")],
-                                include_dirs=include_dirs,
-                                define_macros=[('WIN32',None)]
+                                include_dirs=include_dirs
                            )
 
+        if winbuild:
+            self.define_macros.extend([('WIN32',None),('NDEBUG',None),('_WINDOWS',None)])
+
 PSPModule = PSPExtension(getmp_srcdir(), [getmp_includedir()])
 
 modpy_src_files = ("mod_python.c", "_apachemodule.c", "connobject.c", "filterobject.c",