diff --git a/source/UI/js/Form/ButtonGroup.js b/source/UI/js/Form/ButtonGroup.js
index b4ff9ef1..d8eb06ab 100644
--- a/source/UI/js/Form/ButtonGroup.js
+++ b/source/UI/js/Form/ButtonGroup.js
@@ -31,9 +31,9 @@ Ox.ButtonGroup = function(options, self) {
             .options(options || {})
             .update({
                 value: function() {
-                    var values = Ox.makeArray(self.options.value);
+                    var positions = [],
+                        values = Ox.makeArray(self.options.value);
 
-                    var positions = [];
                     Ox.forEach(values, function(value) {
                         var position = Ox.getIndexById(
                             self.options.buttons, value