diff --git a/usr.bin/rsh/rsh.c b/usr.bin/rsh/rsh.c
index a3668300f38..a19539a8a8f 100644
--- a/usr.bin/rsh/rsh.c
+++ b/usr.bin/rsh/rsh.c
@@ -328,7 +328,7 @@ reread:		errno = 0;
 }
 
 void
-connect_timeout(int sig)
+connect_timeout(int sig __unused)
 {
 	char message[] = "timeout reached before connection completed.\n";