diff --git a/contrib/com_err/com_right.h b/contrib/com_err/com_right.h
index d89c5726c4ac..c329bced9785 100644
--- a/contrib/com_err/com_right.h
+++ b/contrib/com_err/com_right.h
@@ -37,10 +37,13 @@
  */
 
 /* $Id: com_right.h,v 1.8 1998/02/17 21:19:43 bg Exp $ */
+/* $FreeBSD$ */
 
 #ifndef __COM_RIGHT_H__
 #define __COM_RIGHT_H__
 
+#include <sys/cdefs.h>
+
 struct error_table {
     char const * const * msgs;
     long base;
@@ -52,8 +55,9 @@ struct et_list {
 };
 extern struct et_list *_et_list;
 
-const char *com_right(struct et_list *list, long code);
-void initialize_error_table_r(struct et_list **, const char **, int, long);
-void free_error_table(struct et_list *);
+const char *com_right __P((struct et_list *list, long code));
+void initialize_error_table_r __P((struct et_list **, const char **, int,
+				   long));
+void free_error_table __P((struct et_list *));
 
 #endif /* __COM_RIGHT_H__ */