diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index 8a4e6a2..106228d 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -58,6 +58,9 @@
 
 /* --- Internal Unicode Format -------------------------------------------- */
 
+/* Python 3.x requires unicode */
+#define Py_USING_UNICODE 
+
 /* FIXME: MvL's new implementation assumes that Py_UNICODE_SIZE is
    properly set, but the default rules below doesn't set it.  I'll
    sort this out some other day -- fredrik@pythonware.com */