diff --git a/build/server-phar.php b/build/server-phar.php
index e6e13924af..7b9cf5eb1d 100644
--- a/build/server-phar.php
+++ b/build/server-phar.php
@@ -49,7 +49,7 @@ require dirname(__DIR__) . '/vendor/autoload.php';
  *
  * @return string[]
  */
-function preg_quote_array(array $strings, string $delim = null) : array{
+function preg_quote_array(array $strings, string $delim) : array{
 	return array_map(function(string $str) use ($delim) : string{ return preg_quote($str, $delim); }, $strings);
 }
 
diff --git a/tests/phpstan/configs/l8-baseline.neon b/tests/phpstan/configs/l8-baseline.neon
index 89106bbb03..0cc0e3980a 100644
--- a/tests/phpstan/configs/l8-baseline.neon
+++ b/tests/phpstan/configs/l8-baseline.neon
@@ -5,11 +5,6 @@ parameters:
 			count: 1
 			path: ../../../build/make-release.php
 
-		-
-			message: "#^Parameter \\#2 \\$delim_char of function preg_quote expects string, string\\|null given\\.$#"
-			count: 1
-			path: ../../../build/server-phar.php
-
 		-
 			message: "#^Parameter \\#1 \\$name of method pocketmine\\\\world\\\\generator\\\\GeneratorManager\\:\\:getGenerator\\(\\) expects string, string\\|null given\\.$#"
 			count: 1