diff --git a/build/phaser.d.ts b/build/phaser.d.ts
index 79b547419..98b1b33cd 100644
--- a/build/phaser.d.ts
+++ b/build/phaser.d.ts
@@ -2377,7 +2377,7 @@ declare module Phaser {
         spritesheet(key: string, url: string, frameWidth: number, frameHeight: number, frameMax?: number, margin?: number, spacing?: number): Phaser.Loader;
         start(): void;
         text(key: string, url: string, overwrite?: boolean): Phaser.Loader;
-        tilemap(key: string, mapDataURL?: string, mapData?: Object, format?: string): Phaser.Loader;
+        tilemap(key: string, mapDataURL?: string, mapData?: Object, format?: number): Phaser.Loader;
         totalLoadedFiles(): number;
         totalQueuedFiles(): number;
         xmlLoadComplete(index:number): void;
diff --git a/src/loader/Loader.js b/src/loader/Loader.js
index 6008a25d7..c3d480b84 100644
--- a/src/loader/Loader.js
+++ b/src/loader/Loader.js
@@ -514,7 +514,7 @@ Phaser.Loader.prototype = {
     * @param {string} key - Unique asset key of the tilemap data.
     * @param {string} [mapDataURL] - The url of the map data file (csv/json)
     * @param {object} [mapData] - An optional JSON data object. If given then the mapDataURL is ignored and this JSON object is used for map data instead.
-    * @param {string} [format=Phaser.Tilemap.CSV] - The format of the map data. Either Phaser.Tilemap.CSV or Phaser.Tilemap.TILED_JSON.
+    * @param {number} [format=Phaser.Tilemap.CSV] - The format of the map data. Either Phaser.Tilemap.CSV or Phaser.Tilemap.TILED_JSON.
     * @return {Phaser.Loader} This Loader instance.
     */
     tilemap: function (key, mapDataURL, mapData, format) {