From 9a1c90471f630a3011622fed25959b9e197e1ea2 Mon Sep 17 00:00:00 2001
From: Colin Edwards <colin@recursivepenguin.com>
Date: Mon, 25 Mar 2013 10:28:15 -0500
Subject: [PATCH] Ignore unused beeper pins

---
 Marlin/Marlin_main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 1d8e372233..27e35b6a5d 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -1425,7 +1425,7 @@ void process_commands()
     }
     break;
 
-    #ifdef BEEPER
+    #if defined(BEEPER) && BEEPER > -1
     case 300: // M300
     {
       int beepS = 1;