diff --git a/src/PosixSemaphore.php b/src/PosixSemaphore.php
index 4002a97..508c475 100644
--- a/src/PosixSemaphore.php
+++ b/src/PosixSemaphore.php
@@ -50,10 +50,9 @@ public static function create(int $maxLocks, int $permissions = 0600): self
 
         try {
             do {
-                $id = self::getNextId();
-                while (\msg_queue_exists($id)) {
+                do {
                     $id = self::getNextId();
-                }
+                } while (\msg_queue_exists($id));
 
                 if ($queue = \msg_get_queue($id, $permissions)) {
                     $semaphore = new self($queue, $id, \getmypid());