diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index 9b6ae69206..e01bc74b75 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -30,6 +30,8 @@ Components.utils.import("resource://gre/modules/Services.jsm");
 Components.utils.import("resource://gre/modules/osfile.jsm");
 Components.utils.import("resource://gre/modules/PluralForm.jsm");
 
+Services.scriptloader.loadSubScript("resource://zotero/polyfill.js");
+
 /*
  * Core functions
  */
diff --git a/resource/polyfill.js b/resource/polyfill.js
new file mode 100644
index 0000000000..1fa7339f5b
--- /dev/null
+++ b/resource/polyfill.js
@@ -0,0 +1,10 @@
+if (!Object.values) {
+	const reduce = Function.bind.call(Function.call, Array.prototype.reduce);
+	const isEnumerable = Function.bind.call(Function.call, Object.prototype.propertyIsEnumerable);
+	const concat = Function.bind.call(Function.call, Array.prototype.concat);
+	const keys = Reflect.ownKeys;
+	
+	Object.values = function values(O) {
+		return reduce(keys(O), (v, k) => concat(v, typeof k === 'string' && isEnumerable(O, k) ? [O[k]] : []), []);
+	};
+}