diff --git a/src/ol/map.js b/src/ol/map.js
index 5168a36fac..5b5047c45d 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -59,7 +59,6 @@ goog.require('ol.renderer.dom.Map');
 goog.require('ol.renderer.webgl.Map');
 goog.require('ol.size');
 goog.require('ol.structs.PriorityQueue');
-goog.require('ol.tilecoord');
 goog.require('ol.vec.Mat4');
 
 
@@ -937,7 +936,7 @@ ol.Map.prototype.getTilePriority =
   if (!frameState || !(tileSourceKey in frameState.wantedTiles)) {
     return ol.structs.PriorityQueue.DROP;
   }
-  var coordKey = ol.tilecoord.toString(tile.tileCoord);
+  var coordKey = tile.tileCoord.toString();
   if (!frameState.wantedTiles[tileSourceKey][coordKey]) {
     return ol.structs.PriorityQueue.DROP;
   }
diff --git a/src/ol/renderer/canvas/canvastilelayerrenderer.js b/src/ol/renderer/canvas/canvastilelayerrenderer.js
index af355159ad..9eea07979c 100644
--- a/src/ol/renderer/canvas/canvastilelayerrenderer.js
+++ b/src/ol/renderer/canvas/canvastilelayerrenderer.js
@@ -14,7 +14,6 @@ goog.require('ol.extent');
 goog.require('ol.layer.Tile');
 goog.require('ol.renderer.canvas.Layer');
 goog.require('ol.size');
-goog.require('ol.tilecoord');
 goog.require('ol.vec.Mat4');
 
 
@@ -336,7 +335,7 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame =
       }
       goog.asserts.assert(tile);
       if (drawableTile(tile)) {
-        tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile;
+        tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;
         continue;
       }
       fullyLoaded = tileGrid.forEachTileCoordParentTileRange(
diff --git a/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js b/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
index 9bc3a65e99..21ad759429 100644
--- a/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
+++ b/src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
@@ -20,7 +20,6 @@ goog.require('ol.renderer.canvas.Layer');
 goog.require('ol.renderer.vector');
 goog.require('ol.size');
 goog.require('ol.source.VectorTile');
-goog.require('ol.tilecoord');
 goog.require('ol.vec.Mat4');
 
 
@@ -439,7 +438,7 @@ ol.renderer.canvas.VectorTileLayer.prototype.prepareFrame =
       if (tileState == ol.TileState.LOADED ||
           tileState == ol.TileState.EMPTY ||
           (tileState == ol.TileState.ERROR && !useInterimTilesOnError)) {
-        tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile;
+        tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;
         continue;
       }
 
diff --git a/src/ol/renderer/dom/domtilelayerrenderer.js b/src/ol/renderer/dom/domtilelayerrenderer.js
index e26469bd85..1ed26c5bab 100644
--- a/src/ol/renderer/dom/domtilelayerrenderer.js
+++ b/src/ol/renderer/dom/domtilelayerrenderer.js
@@ -19,7 +19,6 @@ goog.require('ol.extent');
 goog.require('ol.layer.Tile');
 goog.require('ol.renderer.dom.Layer');
 goog.require('ol.size');
-goog.require('ol.tilecoord');
 goog.require('ol.tilegrid.TileGrid');
 goog.require('ol.vec.Mat4');
 
@@ -142,7 +141,7 @@ ol.renderer.dom.TileLayer.prototype.prepareFrame =
       goog.asserts.assert(tile);
       tileState = tile.getState();
       if (tileState == ol.TileState.LOADED) {
-        tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile;
+        tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;
         continue;
       } else if (tileState == ol.TileState.EMPTY ||
                  (tileState == ol.TileState.ERROR &&
@@ -345,7 +344,7 @@ ol.renderer.dom.TileLayerZ_.prototype.addTile = function(tile, tileGutter) {
   var tileCoordY = tileCoord[2];
   goog.asserts.assert(tileCoordZ == this.tileCoordOrigin_[0],
       'tileCoordZ matches z of tileCoordOrigin');
-  var tileCoordKey = ol.tilecoord.toString(tileCoord);
+  var tileCoordKey = tileCoord.toString();
   if (tileCoordKey in this.tiles_) {
     return;
   }
@@ -437,7 +436,7 @@ ol.renderer.dom.TileLayerZ_.prototype.removeTilesOutsideExtent =
   var i, ii;
   for (i = 0, ii = tilesToRemove.length; i < ii; ++i) {
     tile = tilesToRemove[i];
-    tileCoordKey = ol.tilecoord.toString(tile.tileCoord);
+    tileCoordKey = tile.tileCoord.toString();
     goog.dom.removeNode(tile.getImage(this));
     delete this.tiles_[tileCoordKey];
   }
diff --git a/src/ol/renderer/layerrenderer.js b/src/ol/renderer/layerrenderer.js
index 7ab15e54a2..6518480db4 100644
--- a/src/ol/renderer/layerrenderer.js
+++ b/src/ol/renderer/layerrenderer.js
@@ -13,7 +13,6 @@ goog.require('ol.layer.Layer');
 goog.require('ol.source.Source');
 goog.require('ol.source.State');
 goog.require('ol.source.Tile');
-goog.require('ol.tilecoord');
 goog.require('ol.vec.Mat4');
 
 
@@ -319,7 +318,7 @@ ol.renderer.Layer.prototype.manageTilePyramid = function(
         if (currentZ - z <= preload) {
           tile = tileSource.getTile(z, x, y, pixelRatio, projection);
           if (tile.getState() == ol.TileState.IDLE) {
-            wantedTiles[ol.tilecoord.toString(tile.tileCoord)] = true;
+            wantedTiles[tile.tileCoord.toString()] = true;
             if (!tileQueue.isKeyQueued(tile.getKey())) {
               tileQueue.enqueue([tile, tileSourceKey,
                 tileGrid.getTileCoordCenter(tile.tileCoord), tileResolution]);
diff --git a/src/ol/renderer/webgl/webgltilelayerrenderer.js b/src/ol/renderer/webgl/webgltilelayerrenderer.js
index d6a6484dfe..0eb9a11b48 100644
--- a/src/ol/renderer/webgl/webgltilelayerrenderer.js
+++ b/src/ol/renderer/webgl/webgltilelayerrenderer.js
@@ -18,7 +18,6 @@ goog.require('ol.renderer.webgl.tilelayer.shader.Fragment');
 goog.require('ol.renderer.webgl.tilelayer.shader.Locations');
 goog.require('ol.renderer.webgl.tilelayer.shader.Vertex');
 goog.require('ol.size');
-goog.require('ol.tilecoord');
 goog.require('ol.vec.Mat4');
 goog.require('ol.webgl.Buffer');
 
@@ -271,7 +270,7 @@ ol.renderer.webgl.TileLayer.prototype.prepareFrame =
         tileState = tile.getState();
         if (tileState == ol.TileState.LOADED) {
           if (mapRenderer.isTileTextureLoaded(tile)) {
-            tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile;
+            tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;
             continue;
           }
         } else if (tileState == ol.TileState.EMPTY ||
diff --git a/src/ol/source/tiledebugsource.js b/src/ol/source/tiledebugsource.js
index 32a0fad16d..336c832693 100644
--- a/src/ol/source/tiledebugsource.js
+++ b/src/ol/source/tiledebugsource.js
@@ -6,7 +6,6 @@ goog.require('ol.TileState');
 goog.require('ol.dom');
 goog.require('ol.size');
 goog.require('ol.source.Tile');
-goog.require('ol.tilecoord');
 
 
 
@@ -113,8 +112,8 @@ ol.source.TileDebug.prototype.getTile = function(z, x, y) {
     var tileSize = ol.size.toSize(this.tileGrid.getTileSize(z));
     var tileCoord = [z, x, y];
     var textTileCoord = this.getTileCoordForTileUrlFunction(tileCoord);
-    var text = !textTileCoord ? '' : ol.tilecoord.toString(
-        this.getTileCoordForTileUrlFunction(textTileCoord));
+    var text = !textTileCoord ? '' :
+        this.getTileCoordForTileUrlFunction(textTileCoord).toString();
     var tile = new ol.DebugTile_(tileCoord, tileSize, text);
     this.tileCache.set(tileCoordKey, tile);
     return tile;
diff --git a/src/ol/tilecoord.js b/src/ol/tilecoord.js
index 52a216fa32..a463a95b7a 100644
--- a/src/ol/tilecoord.js
+++ b/src/ol/tilecoord.js
@@ -103,15 +103,6 @@ ol.tilecoord.quadKey = function(tileCoord) {
 };
 
 
-/**
- * @param {ol.TileCoord} tileCoord Tile coord.
- * @return {string} String.
- */
-ol.tilecoord.toString = function(tileCoord) {
-  return ol.tilecoord.getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);
-};
-
-
 /**
  * @param {ol.TileCoord} tileCoord Tile coordinate.
  * @param {ol.tilegrid.TileGrid} tileGrid Tile grid.