diff --git a/core/lib/Drupal/Core/Entity/EntityCreateAccessCheck.php b/core/lib/Drupal/Core/Entity/EntityCreateAccessCheck.php
index bdb5edb..5314e7a 100644
--- a/core/lib/Drupal/Core/Entity/EntityCreateAccessCheck.php
+++ b/core/lib/Drupal/Core/Entity/EntityCreateAccessCheck.php
@@ -53,8 +53,9 @@ public function appliesTo() {
   public function access(Route $route, Request $request) {
     list($entity_type, $bundle) = explode(':', $route->getRequirement($this->requirementsKey) . ':');
 
-    // The bundle argument can contain request arguments like {name},
-    // replace those with the raw value of that argument.
+    // The bundle argument can contain request argument placeholders like
+    // {name}, loop over the raw variables and attempt to replace them in the
+    // bundle name. If a placeholder does not exist, it won't get replaced.
     if ($bundle && strpos($bundle, '{') !== FALSE) {
       foreach ($request->get('_raw_variables')->all() as $name => $value) {
         $bundle = str_replace('{' . $name . '}', $value, $bundle);