diff --git a/src/Eccube/DependencyInjection/EccubeExtension.php b/src/Eccube/DependencyInjection/EccubeExtension.php
index 5772592a093..815d5e7d488 100644
--- a/src/Eccube/DependencyInjection/EccubeExtension.php
+++ b/src/Eccube/DependencyInjection/EccubeExtension.php
@@ -121,7 +121,7 @@ protected function configurePlugins(ContainerBuilder $container)
 
         $enabled = [];
         foreach ($plugins as $plugin) {
-            if ($plugin['enabled']) {
+            if (array_key_exists('enabled', $plugin) && $plugin['enabled']) {
                 $enabled[] = $plugin['code'];
             }
         }