-extern void clear_list P((void));
-extern void add_dump P((char *date, int level, char *tape, int file, int partnum));
-extern DUMP_ITEM *first_dump P((void));
-extern DUMP_ITEM *next_dump P((DUMP_ITEM *item));
+#define next_dump(item) ((item)->next)
+
+extern void clear_list(void);
+extern void add_dump(char *date, int level, char *tape, off_t file, int partnum);
+extern DUMP_ITEM *first_dump(void);
+#endif /* !DISK_HISTORY_H */