diff --git a/phpBB/phpbb/debug/debug.php b/phpBB/phpbb/debug/debug.php
index bc7b5e22da..af387dbd3d 100644
--- a/phpBB/phpbb/debug/debug.php
+++ b/phpBB/phpbb/debug/debug.php
@@ -15,7 +15,6 @@ namespace phpbb\debug;
 
 use Symfony\Component\ErrorHandler\BufferingLogger;
 use Symfony\Component\ErrorHandler\DebugClassLoader;
-use Symfony\Component\ErrorHandler\ErrorHandler;
 
 /**
  * Registers all the debug tools.
diff --git a/phpBB/phpbb/debug/error_handler.php b/phpBB/phpbb/debug/error_handler.php
index e05f0798ee..89da70e619 100644
--- a/phpBB/phpbb/debug/error_handler.php
+++ b/phpBB/phpbb/debug/error_handler.php
@@ -21,7 +21,10 @@ use Symfony\Component\ErrorHandler\ErrorHandler;
  */
 class error_handler extends ErrorHandler
 {
-	public function __construct(BufferingLogger $bootstrappingLogger = null, private bool $debug = false)
+	/**
+	 * @psalm-suppress MethodSignatureMismatch
+	 */
+	public function __construct(BufferingLogger $bootstrappingLogger = null, private readonly bool $debug = false)
 	{
 		parent::__construct($bootstrappingLogger, $debug);
 	}