diff --git a/lib/BUCK b/lib/BUCK
index 22b8323f81..ecd30ae525 100644
--- a/lib/BUCK
+++ b/lib/BUCK
@@ -13,6 +13,7 @@ define_license(name = 'clippy')
 define_license(name = 'codemirror-minified')
 define_license(name = 'codemirror-original')
 define_license(name = 'diffy')
+define_license(name = 'es6-promise')
 define_license(name = 'fetch')
 define_license(name = 'h2')
 define_license(name = 'highlightjs')
diff --git a/lib/LICENSE-es6-promise b/lib/LICENSE-es6-promise
new file mode 100644
index 0000000000..954ec5992d
--- /dev/null
+++ b/lib/LICENSE-es6-promise
@@ -0,0 +1,19 @@
+Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/lib/js/BUCK b/lib/js/BUCK
index 71b14747fe..30c687bf49 100644
--- a/lib/js/BUCK
+++ b/lib/js/BUCK
@@ -99,6 +99,14 @@ bower_component(
   sha1 = '849ad3ee7c77506548b7b5db603a4e150b9431aa',
 )
 
+bower_component(
+  name = 'es6-promise',
+  package = 'stefanpenner/es6-promise',
+  version = '3.2.2',
+  license = 'es6-promise',
+  sha1 = 'de2eda2fdd744994180a0df03d2b5a936fcb1e70',
+)
+
 bower_component(
   name = 'fetch',
   package = 'fetch',
diff --git a/polygerrit-ui/BUCK b/polygerrit-ui/BUCK
index e26e40c560..80f9f29f17 100644
--- a/polygerrit-ui/BUCK
+++ b/polygerrit-ui/BUCK
@@ -3,6 +3,7 @@ include_defs('//lib/js.defs')
 bower_components(
   name = 'polygerrit_components',
   deps = [
+    '//lib/js:es6-promise',
     '//lib/js:fetch',
     '//lib/js:highlightjs',
     '//lib/js:iron-autogrow-textarea',
diff --git a/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.html b/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.html
index 72ae4e4c6c..59e46cc8a4 100644
--- a/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.html
+++ b/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.html
@@ -15,6 +15,7 @@ limitations under the License.
 -->
 
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
+<script src="../../../bower_components/es6-promise/dist/es6-promise.js"></script>
 <script src="../../../bower_components/fetch/fetch.js"></script>
 
 <dom-module id="gr-rest-api-interface">