diff --git a/src/ol/format/mvt.js b/src/ol/format/mvt.js
index 655a73de9d..7477e73ba8 100644
--- a/src/ol/format/mvt.js
+++ b/src/ol/format/mvt.js
@@ -40,7 +40,7 @@ ol.format.MVT = function(opt_options) {
    * @type {ol.proj.Projection}
    */
   this.defaultDataProjection = new ol.proj.Projection({
-    code: 'EPSG:3857',
+    code: '',
     units: ol.proj.Units.TILE_PIXELS
   });