diff --git a/appl/telnet/telnetd/ext.h b/appl/telnet/telnetd/ext.h
index 626849a3e..8633e239d 100644
--- a/appl/telnet/telnetd/ext.h
+++ b/appl/telnet/telnetd/ext.h
@@ -115,7 +115,7 @@ int tty_iscrnl (void);
 void tty_tspeed (int val);
 void tty_rspeed (int val);
 void getptyslave (void);
-int cleanopen (char *line);
+int cleanopen (char *);
 void startslave (const char *host, const char *, int autologin, char *autoname);
 void init_env (void);
 void start_login (const char *host, int autologin, char *name);
@@ -138,7 +138,7 @@ void ptyflush (void);
 char *nextitem (char *current);
 void netclear (void);
 void netflush (void);
-void writenet (unsigned char *ptr, int len);
+void writenet (const void *, size_t);
 void fatal (int f, char *msg);
 void fatalperror (int f, const char *msg);
 void fatalperror_errno (int f, const char *msg, int error);