diff --git a/ChangeLog b/ChangeLog
index 637b04e9..8ffceab1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,8 +2,8 @@
 
 	* src/grpconv.c, src/groups.c: Name the parameters in the
 	prototypes of the static functions.
-	* src/grpconv.c, src/grpunconv.c: Fail if unexpected parameters
-	are provided.
+	* src/grpconv.c, src/grpunconv.c, src/logoutd.c: Fail if
+	unexpected parameters are provided.
 	* src/grpconv.c, src/grpunconv.c: Indicate that argc is not used
 	in the no SHADOWGRP version.
 
diff --git a/src/logoutd.c b/src/logoutd.c
index 6f964280..078109f4 100644
--- a/src/logoutd.c
+++ b/src/logoutd.c
@@ -53,11 +53,13 @@ static char *Prog;
 #define HUP_MESG_FILE "/etc/logoutd.mesg"
 #endif
 
+/* local function prototypes */
 #if HAVE_UTMPX_H
-static int check_login (const struct utmpx *);
+static int check_login (const struct utmpx *ut);
 #else
-static int check_login (const struct utmp *);
+static int check_login (const struct utmp *ut);
 #endif
+static void send_mesg_to_tty (int tty_fd);
 
 /*
  * check_login - check if user (struct utmpx/utmp) allowed to stay logged in
@@ -154,6 +156,10 @@ int main (int argc, char **argv)
 	char tty_name[sizeof (ut->ut_line) + 6];	/* /dev/ + NUL */
 	int tty_fd;
 
+	if (1 != argc) {
+		(void) fputs (_("Usage: logoutd\n"), stderr);
+	}
+
 	(void) setlocale (LC_ALL, "");
 	(void) bindtextdomain (PACKAGE, LOCALEDIR);
 	(void) textdomain (PACKAGE);