diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
index d4ec1be090927..41548a3e9d263 100644
--- a/src/Symfony/Component/Console/Application.php
+++ b/src/Symfony/Component/Console/Application.php
@@ -87,7 +87,7 @@ class Application implements ResetInterface
     private string $defaultCommand;
     private bool $singleCommand = false;
     private bool $initialized = false;
-    private SignalRegistry $signalRegistry;
+    private ?SignalRegistry $signalRegistry = null;
     private array $signalsToDispatchEvent = [];
 
     public function __construct(string $name = 'UNKNOWN', string $version = 'UNKNOWN')