diff --git a/themes/bootstrap3/templates/layout/layout.phtml b/themes/bootstrap3/templates/layout/layout.phtml
index 0bd3debc78e5423a80c405b93a96036f275e88ed..8c985b6e75af2ca87fd0d4e16421a43694305e0d 100644
--- a/themes/bootstrap3/templates/layout/layout.phtml
+++ b/themes/bootstrap3/templates/layout/layout.phtml
@@ -23,8 +23,6 @@
     <?
       // Set global path for Javascript code:
       $this->headScript()->prependScript("path = '" . rtrim($this->url('home'), '/') . "';");
-      // Polyfill btoa
-      $this->headScript()->appendFile('vendor/base64.js', 'text/javascript', array('conditional' => 'lt IE 10'));
 
       // Deal with cart stuff:
       if (!isset($this->renderingError)) {
diff --git a/themes/bootstrap3/theme.config.php b/themes/bootstrap3/theme.config.php
index cf4fdd8a26163a396b02f70df5b2129463da2b7b..f6eeeb6817f0b857ff8c44f6bab882537d5c47c2 100644
--- a/themes/bootstrap3/theme.config.php
+++ b/themes/bootstrap3/theme.config.php
@@ -11,6 +11,7 @@ return array(
         'print.css:print',
     ),
     'js' => array(
+        'vendor/base64.js:lt IE 10', // btoa polyfill
         'vendor/jquery.min.js',
         'vendor/bootstrap.min.js',
         'vendor/bootstrap-accessibility.min.js',