diff --git a/js/id/renderer/background.js b/js/id/renderer/background.js
index 6d7ac3d92..184f98401 100644
--- a/js/id/renderer/background.js
+++ b/js/id/renderer/background.js
@@ -2,7 +2,7 @@ iD.Background = function() {
     var tile = d3.geo.tile(),
         projection,
         cache = {},
-        offset = [0, 0];
+        offset = [0, 0],
         transformProp = iD.util.prefixCSSProperty('Transform'),
         source = d3.functor('');