diff --git a/js/id/renderer/map.js b/js/id/renderer/map.js
index 21313ee39..c3d5ec696 100644
--- a/js/id/renderer/map.js
+++ b/js/id/renderer/map.js
@@ -317,6 +317,7 @@ iD.Map = function(context) {
             return new iD.geo.Extent(projection.invert([0, dimensions[1]]),
                                  projection.invert([dimensions[0], 0]));
         } else {
+            var extent = iD.geo.Extent(_);
             map.centerZoom(extent.center(), map.extentZoom(extent));
         }
     };