diff --git a/src/ol/source/tiledwmssource.js b/src/ol/source/tiledwmssource.js
index ebc8e7ab8c..935fac2554 100644
--- a/src/ol/source/tiledwmssource.js
+++ b/src/ol/source/tiledwmssource.js
@@ -49,8 +49,7 @@ ol.source.TiledWMS = function(tiledWMSOptions) {
     var x = tileCoord.x;
     var tileExtent = tileGrid.getTileCoordExtent(tileCoord);
     var projectionExtent = projection.getExtent();
-    var extent = goog.isDef(tiledWMSOptions.extent) ?
-        tiledWMSOptions.extent : projectionExtent;
+    extent = goog.isDef(extent) ? extent : projectionExtent;
     // FIXME do we want a wrapDateLine param? The code below will break maps
     // with projections that do not span the whole world width.
     if (extent.minX === projectionExtent.minX &&