diff --git a/mailpoet/tasks/fix-guzzle.php b/mailpoet/tasks/fix-guzzle.php
index cf3305053a..3df4d5f7db 100644
--- a/mailpoet/tasks/fix-guzzle.php
+++ b/mailpoet/tasks/fix-guzzle.php
@@ -24,8 +24,8 @@ if (!file_exists($clientFilePath) || version_compare(phpversion(), '8.0.0') == -
 }
 $replacement = '
 // Updated by MailPoet
-function http_build_query($data, string $numeric_prefix = "", ?string $arg_separator = "&", int $encoding_type = PHP_QUERY_RFC1738) {
-  $prefix = empty($numeric_prefix) ? "" : $numeric_prefix; 
+function http_build_query($data, ?string $numeric_prefix = "", ?string $arg_separator = "&", int $encoding_type = PHP_QUERY_RFC1738) {
+  $prefix = empty($numeric_prefix) ? "" : $numeric_prefix;
   return \http_build_query($data, $numeric_prefix, $arg_separator, $encoding_type);
 }