diff --git a/src/ol/tilebounds.js b/src/ol/tilebounds.js
index ace41a050a..133f62117c 100644
--- a/src/ol/tilebounds.js
+++ b/src/ol/tilebounds.js
@@ -59,6 +59,16 @@ ol.TileBounds.prototype.contains = function(tileBounds) {
 };
 
 
+/**
+ * @param {ol.TileBounds} tileBounds Tile bounds.
+ * @return {boolean} Equals.
+ */
+ol.TileBounds.prototype.equals = function(tileBounds) {
+  return this.minX == tileBounds.minX && tileBounds.maxX == this.maxX &&
+      this.minY == tileBounds.minY && tileBounds.minY == this.minY;
+};
+
+
 /**
  * @param {number} z Z.
  * @param {function(this: T, ol.TileCoord)} f Callback.