diff --git a/test/mjsunit/compiler/regress-4470-1.js b/test/mjsunit/compiler/regress-4470-1.js
new file mode 100644
index 0000000000..91d26b7212
--- /dev/null
+++ b/test/mjsunit/compiler/regress-4470-1.js
@@ -0,0 +1,16 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+function Foo() {}
+Foo.prototype.x = 0;
+function foo(f) {
+  f.x = 1;
+}
+foo(new Foo);
+foo(new Foo);
+%OptimizeFunctionOnNextCall(foo);
+foo(new Foo);
+assertEquals(Foo.prototype.x, 0);