diff --git a/ArduCopter/commands.pde b/ArduCopter/commands.pde
index d028fb3ab2..7a475f01c8 100644
--- a/ArduCopter/commands.pde
+++ b/ArduCopter/commands.pde
@@ -22,7 +22,7 @@ static void init_home()
     }
 
     // update navigation scalers.  used to offset the shrinking longitude as we go towards the poles
-    scaleLongDown = longitude_scale(home);
+    scaleLongDown = longitude_scale(loc);
     scaleLongUp   = 1.0f/scaleLongDown;
 }