diff --git a/Transport/Connection.php b/Transport/Connection.php
index 7b742ce..a3d6b81 100644
--- a/Transport/Connection.php
+++ b/Transport/Connection.php
@@ -266,7 +266,7 @@ private static function normalizeQueueArguments(array $arguments): array
 
     private static function hasCaCertConfigured(array $amqpOptions): bool
     {
-        return (isset($amqpOptions['cacert']) && '' !== $amqpOptions['cacert']) || '' !== ini_get('amqp.cacert');
+        return (isset($amqpOptions['cacert']) && '' !== $amqpOptions['cacert']) || '' !== \ini_get('amqp.cacert');
     }
 
     /**