diff --git a/FrameworkBundle.php b/FrameworkBundle.php
index ed85fa2ea..931ca3328 100644
--- a/FrameworkBundle.php
+++ b/FrameworkBundle.php
@@ -23,6 +23,11 @@
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TestServiceContainerWeakRefPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\UnusedTagsPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\WorkflowGuardListenerPass;
+use Symfony\Component\Cache\Adapter\ApcuAdapter;
+use Symfony\Component\Cache\Adapter\ArrayAdapter;
+use Symfony\Component\Cache\Adapter\ChainAdapter;
+use Symfony\Component\Cache\Adapter\PhpArrayAdapter;
+use Symfony\Component\Cache\Adapter\PhpFilesAdapter;
 use Symfony\Component\Cache\DependencyInjection\CacheCollectorPass;
 use Symfony\Component\Cache\DependencyInjection\CachePoolClearerPass;
 use Symfony\Component\Cache\DependencyInjection\CachePoolPass;
@@ -32,6 +37,7 @@
 use Symfony\Component\DependencyInjection\Compiler\PassConfig;
 use Symfony\Component\DependencyInjection\Compiler\RegisterReverseContainerPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\Dotenv\Dotenv;
 use Symfony\Component\ErrorHandler\ErrorHandler;
 use Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass;
 use Symfony\Component\Form\DependencyInjection\FormPass;
@@ -58,6 +64,19 @@
 use Symfony\Component\Validator\DependencyInjection\AddAutoMappingConfigurationPass;
 use Symfony\Component\Validator\DependencyInjection\AddConstraintValidatorsPass;
 use Symfony\Component\Validator\DependencyInjection\AddValidatorInitializersPass;
+use Symfony\Component\VarExporter\Internal\Hydrator;
+use Symfony\Component\VarExporter\Internal\Registry;
+
+// Help opcache.preload discover always-needed symbols
+class_exists(ApcuAdapter::class);
+class_exists(ArrayAdapter::class);
+class_exists(ChainAdapter::class);
+class_exists(PhpArrayAdapter::class);
+class_exists(PhpFilesAdapter::class);
+class_exists(Dotenv::class);
+class_exists(ErrorHandler::class);
+class_exists(Hydrator::class);
+class_exists(Registry::class);
 
 /**
  * Bundle.
diff --git a/Routing/Router.php b/Routing/Router.php
index 08628f406..8971e5330 100644
--- a/Routing/Router.php
+++ b/Routing/Router.php
@@ -20,10 +20,15 @@
 use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 use Symfony\Component\HttpKernel\CacheWarmer\WarmableInterface;
+use Symfony\Component\Routing\Annotation\Route;
 use Symfony\Component\Routing\RequestContext;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\Router as BaseRouter;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(RedirectableCompiledUrlMatcher::class);
+class_exists(Route::class);
+
 /**
  * This Router creates the Loader only when the cache is empty.
  *