-void ChapInit __ARGS((int));
-void ChapAuthWithPeer __ARGS((int, char *, int));
-void ChapAuthPeer __ARGS((int, char *, int));
-void ChapLowerUp __ARGS((int));
-void ChapLowerDown __ARGS((int));
-void ChapInput __ARGS((int, u_char *, int));
-void ChapProtocolReject __ARGS((int));
-int ChapPrintPkt __ARGS((u_char *, int,
- void (*) __ARGS((void *, char *, ...)), void *));
+void ChapInit __P((int));
+void ChapAuthWithPeer __P((int, char *, int));
+void ChapAuthPeer __P((int, char *, int));
+void ChapLowerUp __P((int));
+void ChapLowerDown __P((int));
+void ChapInput __P((int, u_char *, int));
+void ChapProtocolReject __P((int));
+int ChapPrintPkt __P((u_char *, int,
+ void (*) __P((void *, char *, ...)), void *));