--- ppp-2.4.5.orig/pppd/upap.h	2009-11-16 23:26:07.000000000 +0100
+++ ppp-2.4.5/pppd/upap.h	2014-03-17 16:13:13.000000000 +0100
@@ -104,7 +104,7 @@ typedef struct upap_state {
 
 extern upap_state upap[];
 
-void upap_authwithpeer __P((int, char *, char *));
-void upap_authpeer __P((int));
+void upap_authwithpeer (int, char *, char *);
+void upap_authpeer (int);
 
 extern struct protent pap_protent;
