diff --git a/nt/config.nt b/nt/config.nt
index 4b8c38823af..0f66a441c7b 100644
--- a/nt/config.nt
+++ b/nt/config.nt
@@ -233,6 +233,7 @@ Boston, MA 02110-1301, USA.  */
 #undef HAVE_MKTIME
 #undef HAVE_EUIDACCESS
 #undef HAVE_GETPAGESIZE
+#undef HAVE_GET_CURRENT_DIR_NAME
 #undef HAVE_TZSET
 #undef HAVE_SETLOCALE
 #undef HAVE_UTIMES