diff --git a/pkg/amqp-bunny/AmqpSubscriptionConsumer.php b/pkg/amqp-bunny/AmqpSubscriptionConsumer.php
index 4fff4f8ab..b36bcd949 100644
--- a/pkg/amqp-bunny/AmqpSubscriptionConsumer.php
+++ b/pkg/amqp-bunny/AmqpSubscriptionConsumer.php
@@ -88,7 +88,7 @@ public function subscribe(Consumer $consumer, callable $callback): void
         $frame = $this->context->getBunnyChannel()->consume(
             $bunnyCallback,
             $consumer->getQueue()->getQueueName(),
-            $consumer->getConsumerTag(),
+            $consumer->getConsumerTag() ?? '',
             (bool) ($consumer->getFlags() & InteropAmqpConsumer::FLAG_NOLOCAL),
             (bool) ($consumer->getFlags() & InteropAmqpConsumer::FLAG_NOACK),
             (bool) ($consumer->getFlags() & InteropAmqpConsumer::FLAG_EXCLUSIVE),