diff --git a/src/ol/expression/expressions.js b/src/ol/expression/expressions.js
index 98a608ca2c..44c4435b5d 100644
--- a/src/ol/expression/expressions.js
+++ b/src/ol/expression/expressions.js
@@ -47,17 +47,17 @@ ol.expression.Expression.prototype.evaluate = goog.abstractMethod;
  *
  * @constructor
  * @extends {ol.expression.Expression}
- * @param {ol.expression.Expression} expr An expression that resolves to a
+ * @param {ol.expression.Expression} callee An expression that resolves to a
  *     function.
  * @param {Array.<ol.expression.Expression>} args Arguments.
  */
-ol.expression.Call = function(expr, args) {
+ol.expression.Call = function(callee, args) {
 
   /**
    * @type {ol.expression.Expression}
    * @private
    */
-  this.expr_ = expr;
+  this.callee_ = callee;
 
   /**
    * @type {Array.<ol.expression.Expression>}
@@ -74,7 +74,7 @@ goog.inherits(ol.expression.Call, ol.expression.Expression);
  */
 ol.expression.Call.prototype.evaluate = function(opt_scope, opt_fns, opt_this) {
   var fnScope = goog.isDefAndNotNull(opt_fns) ? opt_fns : opt_scope;
-  var fn = this.expr_.evaluate(fnScope);
+  var fn = this.callee_.evaluate(fnScope);
   if (!fn || !goog.isFunction(fn)) {
     throw new Error('Expected function but found ' + fn);
   }
@@ -89,6 +89,24 @@ ol.expression.Call.prototype.evaluate = function(opt_scope, opt_fns, opt_this) {
 };
 
 
+/**
+ * Get the argument list.
+ * @return {Array.<ol.expression.Expression>} The argument.
+ */
+ol.expression.Call.prototype.getArgs = function() {
+  return this.args_;
+};
+
+
+/**
+ * Get the callee expression.
+ * @return {ol.expression.Expression} The callee expression.
+ */
+ol.expression.Call.prototype.getCallee = function() {
+  return this.callee_;
+};
+
+
 /**
  * @enum {string}
  */
diff --git a/test/spec/ol/expression/expressions.test.js b/test/spec/ol/expression/expressions.test.js
index 1e924fd8e7..7d589f7bae 100644
--- a/test/spec/ol/expression/expressions.test.js
+++ b/test/spec/ol/expression/expressions.test.js
@@ -67,6 +67,22 @@ describe('ol.expression.Call', function() {
 
   });
 
+  var callee = new ol.expression.Identifier('sqrt');
+  var args = [new ol.expression.Literal(42)];
+  var expr = new ol.expression.Call(callee, args);
+
+  describe('#getArgs()', function() {
+    it('gets the callee expression', function() {
+      expect(expr.getArgs()).to.be(args);
+    });
+  });
+
+  describe('#getCallee()', function() {
+    it('gets the callee expression', function() {
+      expect(expr.getCallee()).to.be(callee);
+    });
+  });
+
 });