Index: idled.h
--- idled.h.orig
+++ idled.h
@@ -1,5 +1,7 @@
 #include <sys/types.h>
+#include <stdarg.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/param.h>
 #include <utmp.h>
 
@@ -197,7 +199,7 @@ extern	int	warn_flags;	/* what warnings to make */
 extern	int	mult_per_user;  /* number of multiple logins allowed per user */
 extern	int	ioidle;         /* True=use i&o as idle time ; False=i only */
 
-extern	void	logfile();
+extern	void	logfile(const char *s, ...);
 
 /* This is used for trapping errors caused by the utmp file getting
  * out of touch with reality and telling idled that a user is logged