diff --git a/nt/ChangeLog b/nt/ChangeLog
index 033a909c752..000e21a842e 100644
--- a/nt/ChangeLog
+++ b/nt/ChangeLog
@@ -1,3 +1,8 @@
+2012-07-29  Juanma Barranquero  <lekktu@gmail.com>
+
+	* config.nt: Sync with autogen/config.in.
+	(HAVE_ENVIRON_DECL): New macro.
+
 2012-07-29  Eli Zaretskii  <eliz@gnu.org>
 
 	* inc/stdalign.h (_Alignas, alignas): Define.
diff --git a/nt/config.nt b/nt/config.nt
index d32ead3d9c0..dfb4f61ac80 100644
--- a/nt/config.nt
+++ b/nt/config.nt
@@ -339,6 +339,9 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* Define to 1 if you have the `endpwent' function. */
 #undef HAVE_ENDPWENT
 
+/* Define if you have the declaration of environ. */
+#undef HAVE_ENVIRON_DECL
+
 /* Define to 1 if you have the `euidaccess' function. */
 #undef HAVE_EUIDACCESS