--- ppp-2.4.5.orig/pppd/pppcrypt.h	2009-11-16 23:26:07.000000000 +0100
+++ ppp-2.4.5/pppd/pppcrypt.h	2014-03-17 16:13:13.000000000 +0100
@@ -41,8 +41,8 @@
 #include <des.h>
 #endif
 
-extern bool	DesSetkey __P((u_char *));
-extern bool	DesEncrypt __P((u_char *, u_char *));
-extern bool	DesDecrypt __P((u_char *, u_char *));
+extern bool	DesSetkey (u_char *);
+extern bool	DesEncrypt (u_char *, u_char *);
+extern bool	DesDecrypt (u_char *, u_char *);
 
 #endif /* PPPCRYPT_H */
