diff --git a/src/ol/render/canvas/replay.js b/src/ol/render/canvas/replay.js
index 18fb4c1d66..42e61d18f6 100644
--- a/src/ol/render/canvas/replay.js
+++ b/src/ol/render/canvas/replay.js
@@ -89,7 +89,7 @@ ol.render.canvas.Replay = function(tolerance, maxExtent, resolution, overlaps) {
 
   /**
    * @private
-   * @type {ol.Transform}
+   * @type {!ol.Transform}
    */
   this.renderedTransform_ = ol.transform.create();
 
@@ -103,17 +103,17 @@ ol.render.canvas.Replay = function(tolerance, maxExtent, resolution, overlaps) {
    * @private
    * @type {Array.<number>}
    */
-  this.pixelCoordinates_ = [];
+  this.pixelCoordinates_ = null;
 
   /**
    * @private
-   * @type {ol.Transform}
+   * @type {!ol.Transform}
    */
   this.tmpLocalTransform_ = ol.transform.create();
 
   /**
    * @private
-   * @type {ol.Transform}
+   * @type {!ol.Transform}
    */
   this.resetTransform_ = ol.transform.create();
 };
@@ -229,9 +229,12 @@ ol.render.canvas.Replay.prototype.replay_ = function(
     instructions, featureCallback, opt_hitExtent) {
   /** @type {Array.<number>} */
   var pixelCoordinates;
-  if (ol.array.equals(transform, this.renderedTransform_)) {
+  if (this.pixelCoordinates_ && ol.array.equals(transform, this.renderedTransform_)) {
     pixelCoordinates = this.pixelCoordinates_;
   } else {
+    if (!this.pixelCoordinates_) {
+      this.pixelCoordinates_ = [];
+    }
     pixelCoordinates = ol.geom.flat.transform.transform2D(
         this.coordinates, 0, this.coordinates.length, 2,
         transform, this.pixelCoordinates_);
diff --git a/src/ol/typedefs.js b/src/ol/typedefs.js
index 6985f6a158..659afd2a8a 100644
--- a/src/ol/typedefs.js
+++ b/src/ol/typedefs.js
@@ -360,7 +360,7 @@ ol.MapOptionsInternal;
 /**
  * An array representing an affine 2d transformation for use with
  * {@link ol.transform} functions. The array has 6 elements.
- * @typedef {Array.<number>}
+ * @typedef {!Array.<number>}
  */
 ol.Transform;