diff --git a/src/Symfony/Component/Messenger/Bridge/Doctrine/Tests/Transport/DoctrineIntegrationTest.php b/src/Symfony/Component/Messenger/Bridge/Doctrine/Tests/Transport/DoctrineIntegrationTest.php
index b900fa86d5774..0a34c86bc48f0 100644
--- a/src/Symfony/Component/Messenger/Bridge/Doctrine/Tests/Transport/DoctrineIntegrationTest.php
+++ b/src/Symfony/Component/Messenger/Bridge/Doctrine/Tests/Transport/DoctrineIntegrationTest.php
@@ -67,10 +67,29 @@ public function testSendWithDelay()
         // DBAL 2 compatibility
         $result = method_exists($qb, 'executeQuery') ? $qb->executeQuery() : $qb->execute();
 
-        $available_at = new \DateTimeImmutable($result->fetchOne());
+        $availableAt = new \DateTimeImmutable($result->fetchOne());
 
         $now = new \DateTimeImmutable('now + 60 seconds');
-        $this->assertGreaterThan($now, $available_at);
+        $this->assertGreaterThan($now, $availableAt);
+    }
+
+    public function testSendWithNegativeDelay()
+    {
+        $this->connection->send('{"message": "Hi, I am not actually delayed"}', ['type' => DummyMessage::class], -600000);
+
+        $qb = $this->driverConnection->createQueryBuilder()
+            ->select('m.available_at')
+            ->from('messenger_messages', 'm')
+            ->where('m.body = :body')
+            ->setParameter('body', '{"message": "Hi, I am not actually delayed"}');
+
+        // DBAL 2 compatibility
+        $result = method_exists($qb, 'executeQuery') ? $qb->executeQuery() : $qb->execute();
+
+        $availableAt = new \DateTimeImmutable($result->fetchOne());
+
+        $now = new \DateTimeImmutable('now - 60 seconds');
+        $this->assertLessThan($now, $availableAt);
     }
 
     public function testItRetrieveTheFirstAvailableMessage()
diff --git a/src/Symfony/Component/Messenger/Bridge/Doctrine/Transport/Connection.php b/src/Symfony/Component/Messenger/Bridge/Doctrine/Transport/Connection.php
index 2c787e9cca0c3..36875da9023b7 100644
--- a/src/Symfony/Component/Messenger/Bridge/Doctrine/Transport/Connection.php
+++ b/src/Symfony/Component/Messenger/Bridge/Doctrine/Transport/Connection.php
@@ -127,7 +127,7 @@ public static function buildConfiguration(#[\SensitiveParameter] string $dsn, ar
     public function send(string $body, array $headers, int $delay = 0): string
     {
         $now = new \DateTimeImmutable('UTC');
-        $availableAt = $now->modify(sprintf('+%d seconds', $delay / 1000));
+        $availableAt = $now->modify(sprintf('%+d seconds', $delay / 1000));
 
         $queryBuilder = $this->driverConnection->createQueryBuilder()
             ->insert($this->configuration['table_name'])
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/InMemory/InMemoryTransportTest.php b/src/Symfony/Component/Messenger/Tests/Transport/InMemory/InMemoryTransportTest.php
index 0a4b218623a2e..db6b14c455c98 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/InMemory/InMemoryTransportTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/InMemory/InMemoryTransportTest.php
@@ -85,6 +85,15 @@ public function testQueueWithDelay()
         $this->assertSame([$envelope1], $this->transport->get());
     }
 
+    public function testQueueWithNegativeDelay()
+    {
+        $envelope1 = new Envelope(new \stdClass());
+        $envelope1 = $this->transport->send($envelope1);
+        $envelope2 = (new Envelope(new \stdClass()))->with(new DelayStamp(-10_000));
+        $envelope2 = $this->transport->send($envelope2);
+        $this->assertSame([$envelope1, $envelope2], $this->transport->get());
+    }
+
     public function testQueueWithSerialization()
     {
         $envelope = new Envelope(new \stdClass());
diff --git a/src/Symfony/Component/Messenger/Transport/InMemory/InMemoryTransport.php b/src/Symfony/Component/Messenger/Transport/InMemory/InMemoryTransport.php
index 4937c4b325786..b03ddd4448b93 100644
--- a/src/Symfony/Component/Messenger/Transport/InMemory/InMemoryTransport.php
+++ b/src/Symfony/Component/Messenger/Transport/InMemory/InMemoryTransport.php
@@ -102,7 +102,7 @@ public function send(Envelope $envelope): Envelope
         /** @var DelayStamp|null $delayStamp */
         if ($delayStamp = $envelope->last(DelayStamp::class)) {
             $now = $this->clock?->now() ?? new \DateTimeImmutable();
-            $this->availableAt[$id] = $now->modify(sprintf('+%d seconds', $delayStamp->getDelay() / 1000));
+            $this->availableAt[$id] = $now->modify(sprintf('%+d seconds', $delayStamp->getDelay() / 1000));
         }
 
         return $envelope;