diff --git a/polymer-legacy.html b/polymer-legacy.html
index 02ee8730..66386b62 100644
--- a/polymer-legacy.html
+++ b/polymer-legacy.html
@@ -1,4 +1,4 @@
 <!DOCTYPE html>
-<!-- bc compatible Polymer({...}); enabled via Polymer.LegacyElement -->
+<link rel="import" href="src/legacy/legacy-element.html">
 <link rel="import" href="src/legacy/polymer-fn.html">
 <link rel="import" href="src/legacy/class.html">
\ No newline at end of file
diff --git a/src/legacy/legacy-api.html b/src/legacy/legacy-api.html
index be941f01..e05811ff 100644
--- a/src/legacy/legacy-api.html
+++ b/src/legacy/legacy-api.html
@@ -30,7 +30,6 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 
     return class LegacyApi extends mixin {
 
-
       serialize(value) {
         return this._serializeAttribute(value);
       }
diff --git a/src/legacy/legacy-element.html b/src/legacy/legacy-element.html
new file mode 100644
index 00000000..6a9fb444
--- /dev/null
+++ b/src/legacy/legacy-element.html
@@ -0,0 +1,56 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="legacy-api.html">
+
+<script>
+  'use strict';
+
+  Polymer.LegacyElementMixin = Polymer.Utils.dedupingMixin(function(base) {
+
+    return class extends Polymer.LegacyApiMixin(base) {
+
+      constructor() {
+        super();
+        this.created();
+      }
+
+      created() {}
+
+      connectedCallback() {
+        super.connectedCallback();
+        this.isAttached = true;
+        this.attached();
+      }
+
+      attached() {}
+
+      disconnectedCallback() {
+        super.disconnectedCallback();
+        this.isAttached = false;
+        this.detached();
+      }
+
+      detached() {}
+
+      attributeChangedCallback(name, old, value) {
+        if (old !== value) {
+          super.attributeChangedCallback(name, old, value);
+          this.attributeChanged(name, old, value);
+        }
+      }
+
+      attributeChanged() {}
+    }
+
+  });
+
+  Polymer.LegacyElement = Polymer.LegacyElementMixin(HTMLElement);
+</script>
diff --git a/test/runner.html b/test/runner.html
index 94de7ccf..27a7a2ef 100644
--- a/test/runner.html
+++ b/test/runner.html
@@ -41,6 +41,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       'unit/async.html',
       'unit/behaviors.html',
       'unit/polymer.element.html',
+      'unit/polymer.legacyelement.html',
       'unit/debounce.html',
       'unit/inheritance.html',
       'unit/path.html',
