diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 6f699aa..f04e43c 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -1743,12 +1743,13 @@ function theme_menu_local_action($variables) {
   $link['localized_options']['attributes']['class'][] = 'button-action';
 
   $output = '<li>';
-  // @todo Remove the is_plugin check once
-  if (!empty($link['route_name']) && !empty($link['is_plugin'])) {
-    $output .= Drupal::l($link['title'], $link['route_name'], $link['route_parameters'], $link['localized_options']);
+  // @todo Remove this check and the call to l() when all pages are converted
+  // to routes.
+  if (!empty($link['href'])) {
+    $output .= l($link['title'], $link['href'], $link['localized_options']);
   }
   else {
-    $output .= l($link['title'], $link['href'], $link['localized_options']);
+    $output .= Drupal::l($link['title'], $link['route_name'], $link['route_parameters'], $link['localized_options']);
   }
   $output .= "</li>";
 
diff --git a/core/lib/Drupal/Core/Menu/LocalActionManager.php b/core/lib/Drupal/Core/Menu/LocalActionManager.php
index 8abf522..fbdf66b 100644
--- a/core/lib/Drupal/Core/Menu/LocalActionManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalActionManager.php
@@ -37,7 +37,7 @@ class LocalActionManager extends DefaultPluginManager {
    * @var array
    */
   protected $defaults = array(
-    // The ID.
+    // The plugin id. Set by the plugin system based on the top-level YAML key.
     'id' => '',
     // The static title for the local action.
     'title' => '',
@@ -174,7 +174,6 @@ public function getActionsForRoute($route_appears) {
           'route_name' => $route_name,
           'route_parameters' => $route_parameters,
           'localized_options' => $plugin->getOptions($this->request),
-          'is_plugin' => TRUE,
         ),
         '#access' => $this->accessManager->checkNamedRoute($route_name, $route_parameters),
       );