diff --git a/Command/ConsumeMessagesCommand.php b/Command/ConsumeMessagesCommand.php
index 2011e007..28ffee1c 100644
--- a/Command/ConsumeMessagesCommand.php
+++ b/Command/ConsumeMessagesCommand.php
@@ -255,7 +255,7 @@ public function complete(CompletionInput $input, CompletionSuggestions $suggesti
 
     public function getSubscribedSignals(): array
     {
-        return $this->signals ?? (\defined('SIGTERM') ? [\SIGTERM, \SIGINT] : []);
+        return $this->signals ?? (\extension_loaded('pcntl') ? [\SIGTERM, \SIGINT] : []);
     }
 
     public function handleSignal(int $signal, int|false $previousExitCode = 0): int|false
diff --git a/Command/FailedMessagesRetryCommand.php b/Command/FailedMessagesRetryCommand.php
index ae47d774..53e70bb9 100644
--- a/Command/FailedMessagesRetryCommand.php
+++ b/Command/FailedMessagesRetryCommand.php
@@ -134,7 +134,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
     public function getSubscribedSignals(): array
     {
-        return $this->signals ?? (\defined('SIGTERM') ? [\SIGTERM, \SIGINT] : []);
+        return $this->signals ?? (\extension_loaded('pcntl') ? [\SIGTERM, \SIGINT] : []);
     }
 
     public function handleSignal(int $signal, int|false $previousExitCode = 0): int|false