diff --git a/keyboard.xml b/keyboard.xml
index 621df85fd..e87cf4cff 100644
--- a/keyboard.xml
+++ b/keyboard.xml
@@ -570,8 +570,8 @@ calculated by adding 256 to the GLUT key value in glut.h.
    <command>nasal</command>
    <script>
      if (getprop("/sim/hud/visibility")) {
-         var br = getprop("/sim/hud/brightness") - 0.2;
-         setprop("/sim/hud/brightness", br > 0.01 ? br : 1);
+         var br = getprop("/sim/hud/color/brightness") - 0.2;
+         setprop("/sim/hud/color/brightness", br > 0.01 ? br : 1);
      }
    </script>
   </binding>
@@ -755,7 +755,7 @@ calculated by adding 256 to the GLUT key value in glut.h.
         return setprop("/sim/hud/visibility", 1);
     }
     var i = getprop("/sim/hud/current-color") + 1;
-    if (i >= size(props.globals.getNode("/sim/hud/colors", 1).getChildren("color"))) {
+    if (i &lt; 0 or i >= size(props.globals.getNode("/sim/hud/palette", 1).getChildren("color"))) {
        setprop("/sim/hud/visibility", 0);
        setprop("/sim/hud/current-color", 0);
     } else {