diff --git a/lib/com_err/com_right.h b/lib/com_err/com_right.h
index a51d86958..1781f7727 100644
--- a/lib/com_err/com_right.h
+++ b/lib/com_err/com_right.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 1998 Kungliga Tekniska Högskolan
+ * Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden). 
  * All rights reserved. 
  *
@@ -36,6 +36,18 @@
 #ifndef __COM_RIGHT_H__
 #define __COM_RIGHT_H__
 
+#ifdef __STDC__
+#include <stdarg.h>
+#endif
+
+#ifndef __P
+#ifdef __STDC__
+#define __P(X) X
+#else
+#define __P(X) ()
+#endif
+#endif
+
 struct error_table {
     char const * const * msgs;
     long base;
@@ -47,8 +59,8 @@ 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__ */