diff --git a/glib/gconstructor.h b/glib/gconstructor.h
index bb7594641..17c46699a 100644
--- a/glib/gconstructor.h
+++ b/glib/gconstructor.h
@@ -1,3 +1,30 @@
+/* GLIB - Library of useful routines for C programming
+ * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
+ * file for a list of people on the GLib Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GLib at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#ifndef __G_CONSTRUCTOR_H__
+#define __G_CONSTRUCTOR_H__
+
 /*
   If G_HAS_CONSTRUCTORS is true then the compiler support *both* constructors and
   destructors, in a usable way, including e.g. on library unload. If not you're on
@@ -121,3 +148,4 @@
 #endif
 
 #endif /* __GTK_DOC_IGNORE__ */
+#endif /* __G_CONSTRUCTOR_H__ */