diff --git a/src/ol/array.js b/src/ol/array.js
index 7e4c4107ee..c97eaaaee1 100644
--- a/src/ol/array.js
+++ b/src/ol/array.js
@@ -173,3 +173,28 @@ ol.array.remove = function(arr, obj) {
   }
   return i > -1;
 }
+
+
+/**
+ * @param {Array<VALUE>} arr  The array to modify.
+ * @param {?function(this:THISVAL, VALUE, number, ?) : boolean} func The function to compare.
+ * @param {THISVAL=} thisArg Optional this argument for the function.
+ * @template VALUE,THISVAL
+ * @return {VALUE} If the element was removed.
+ */
+ol.array.find = function(arr, func, thisArg) {
+  if (typeof func !== 'function') {
+    throw new TypeError('func must be a function');
+  }
+  var list = Object(arr);
+  var length = list.length >>> 0;
+  var value;
+
+  for (var i = 0; i < length; i++) {
+    value = list[i];
+    if (func.call(thisArg, value, i, list)) {
+      return value;
+    }
+  }
+  return null;
+}
diff --git a/src/ol/source/wmtssource.js b/src/ol/source/wmtssource.js
index 77c322a4d7..22b591aa40 100644
--- a/src/ol/source/wmtssource.js
+++ b/src/ol/source/wmtssource.js
@@ -327,7 +327,7 @@ ol.source.WMTS.optionsFromCapabilities = function(wmtsCap, config) {
       'config "layer" must not be null');
 
   var layers = wmtsCap['Contents']['Layer'];
-  var l = goog.array.find(layers, function(elt, index, array) {
+  var l = ol.array.find(layers, function(elt, index, array) {
     return elt['Identifier'] == config['layer'];
   });
   goog.asserts.assert(l, 'found a matching layer in Contents/Layer');
@@ -340,7 +340,7 @@ ol.source.WMTS.optionsFromCapabilities = function(wmtsCap, config) {
     if ('projection' in config) {
       idx = goog.array.findIndex(l['TileMatrixSetLink'],
           function(elt, index, array) {
-            var tileMatrixSet = goog.array.find(tileMatrixSets, function(el) {
+            var tileMatrixSet = ol.array.find(tileMatrixSets, function(el) {
               return el['Identifier'] == elt['TileMatrixSet'];
             });
             return tileMatrixSet['SupportedCRS'].replace(
@@ -397,7 +397,7 @@ ol.source.WMTS.optionsFromCapabilities = function(wmtsCap, config) {
   }
 
   var matrixSets = wmtsCap['Contents']['TileMatrixSet'];
-  var matrixSetObj = goog.array.find(matrixSets, function(elt, index, array) {
+  var matrixSetObj = ol.array.find(matrixSets, function(elt, index, array) {
     return elt['Identifier'] == matrixSet;
   });
   goog.asserts.assert(matrixSetObj,
@@ -457,7 +457,7 @@ ol.source.WMTS.optionsFromCapabilities = function(wmtsCap, config) {
     var gets = wmtsCap['OperationsMetadata']['GetTile']['DCP']['HTTP']['Get'];
 
     for (var i = 0, ii = gets.length; i < ii; ++i) {
-      var constraint = goog.array.find(gets[i]['Constraint'],
+      var constraint = ol.array.find(gets[i]['Constraint'],
           function(elt, index, array) {
             return elt['name'] == 'GetEncoding';
           });