diff --git a/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php b/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php
index 389e64d5aca8f..0ef3e318be6a9 100644
--- a/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php
@@ -103,7 +103,7 @@ private function createSocket()
 
     private function formatRecord(array $record): string
     {
-        if ($this->processors) {
+        if (property_exists($this, 'processors') && $this->processors) {
             foreach ($this->processors as $processor) {
                 $record = $processor($record);
             }