diff --git a/src/ol/replay/replaybase.js b/src/ol/replay/replaybase.js
index eee09c2d3a..419690a18e 100644
--- a/src/ol/replay/replaybase.js
+++ b/src/ol/replay/replaybase.js
@@ -59,6 +59,12 @@ ol.replay.Batch.prototype.beginPath = goog.abstractMethod;
 ol.replay.Batch.prototype.draw = goog.abstractMethod;
 
 
+/**
+ * @return {ol.Extent} Extent.
+ */
+ol.replay.Batch.prototype.getExtent = goog.abstractMethod;
+
+
 /**
  * @param {ol.replay.FillStyle} fillStyle Fill style.
  */