diff --git a/include/nl_types.h b/include/nl_types.h
index 43eee1f2f9db..ccd771d4b8ee 100644
--- a/include/nl_types.h
+++ b/include/nl_types.h
@@ -1,55 +1,56 @@
-/* $FreeBSD$ */
-
-/***********************************************************
-Copyright 1990, by Alfalfa Software Incorporated, Cambridge, Massachusetts.
-
-                        All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that Alfalfa's name not be used in
-advertising or publicity pertaining to distribution of the software
-without specific, written prior permission.
-
-ALPHALPHA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-ALPHALPHA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-
-If you make any modifications, bugfixes or other changes to this software
-we'd appreciate it if you could send a copy to us so we can keep things
-up-to-date.  Many thanks.
-				Kee Hinckley
-				Alfalfa Software, Inc.
-				267 Allston St., #3
-				Cambridge, MA 02139  USA
-				nazgul@alfalfa.com
-
-******************************************************************/
+/*-
+ * Copyright 1990, by Alfalfa Software Incorporated, Cambridge, Massachusetts.
+ *
+ *                         All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that Alfalfa's name not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.
+ *
+ * ALPHALPHA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * ALPHALPHA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ *
+ * If you make any modifications, bugfixes or other changes to this software
+ * we'd appreciate it if you could send a copy to us so we can keep things
+ * up-to-date.  Many thanks.
+ *				Kee Hinckley
+ *				Alfalfa Software, Inc.
+ *				267 Allston St., #3
+ *				Cambridge, MA 02139  USA
+ *				nazgul@alfalfa.com
+ *
+ * $FreeBSD$
+ */
 
 #ifndef _NL_TYPES_H_
 #define _NL_TYPES_H_
+
 #include <sys/cdefs.h>
+#include <sys/_types.h>
 
 #define	NL_SETD		0
 #define	NL_CAT_LOCALE	1
 
+typedef	void	*nl_catd;
+
 #ifndef _NL_ITEM_DECLARED
 typedef	__nl_item	nl_item;
 #define	_NL_ITEM_DECLARED
 #endif
 
-typedef	void	*nl_catd;
-
 __BEGIN_DECLS
-extern nl_catd 	catopen(__const char *, int);
-extern char    *catgets(nl_catd, int, int,	__const	char *);
-extern int	catclose(nl_catd);
+nl_catd	 catopen(__const char *, int);
+char	*catgets(nl_catd, int, int, __const char *);
+int	 catclose(nl_catd);
 __END_DECLS
 
-#endif	/* _NL_TYPES_H_ */
+#endif /* !_NL_TYPES_H_ */