diff --git a/tools/transpiler/spec/functions_spec.js b/tools/transpiler/spec/functions_spec.js
index ec409cb2d7..097142c4de 100644
--- a/tools/transpiler/spec/functions_spec.js
+++ b/tools/transpiler/spec/functions_spec.js
@@ -4,6 +4,11 @@ function sum(a, b) {
   return a + b;
 }
 
+class ConstructorWithNamedParams {
+  constructor(a, {b=1, c=2}) {
+    this.sum = a + b + c;
+  }
+}
 
 export function main() {
   describe('functions', function() {
@@ -35,6 +40,11 @@ export function main() {
         expect(f({a: 10})).toBe(12);
         expect(f()).toBe(3);
       });
+
+      it("should support new expressions", function () {
+        var obj = new ConstructorWithNamedParams(100, {b:10});
+        expect(obj.sum).toEqual(112);
+      });
     });
     
     describe("optional params", function () {
diff --git a/tools/transpiler/src/codegeneration/NamedParamsTransformer.js b/tools/transpiler/src/codegeneration/NamedParamsTransformer.js
index 22bd7b4a3f..68e056c491 100644
--- a/tools/transpiler/src/codegeneration/NamedParamsTransformer.js
+++ b/tools/transpiler/src/codegeneration/NamedParamsTransformer.js
@@ -32,11 +32,27 @@ export class NamedParamsTransformer extends ParseTreeTransformer {
    */
   transformCallExpression(tree) {
     tree = super.transformCallExpression(tree);
+    this._handleNamedParams(tree);
+    return tree;
+  }
+
+  /**
+   * Transform new expressions.
+   *
+   * @param {NewExpression} tree
+   * @return {ParseTree}
+   */
+  transformNewExpression(tree) {
+    tree = super.transformNewExpression(tree);
+    this._handleNamedParams(tree);
+    return tree;
+  }
+
+  _handleNamedParams(tree) {
     if (this._isLastArgAnNonEmptyObjectLiteral(tree) &&
       ! this._isLastArgObjectLiteralWithQuotedKeys(tree)) {
       this._replaceLastArgWithNamedParams(tree);
     }
-    return tree;
   }
 
   _isLastArgAnNonEmptyObjectLiteral(tree) {