diff --git a/init.d/numlock.in b/init.d/numlock.in
index 1a71367e..06adca7f 100644
--- a/init.d/numlock.in
+++ b/init.d/numlock.in
@@ -4,7 +4,7 @@
 
 description="Turns numlock on for the consoles."
 
-ttyn=${rc_tty_number:-${RC_TTY_NUMBER}:-12}
+ttyn=${rc_tty_number:-${RC_TTY_NUMBER:-12}}
 
 depend()
 {