diff --git a/src/Timer/Timers.php b/src/Timer/Timers.php
index 13b9ef2a..53c46d03 100644
--- a/src/Timer/Timers.php
+++ b/src/Timer/Timers.php
@@ -46,7 +46,8 @@ public function add(TimerInterface $timer)
 
     public function contains(TimerInterface $timer)
     {
-        return isset($this->timers[\spl_object_hash($timer)]);
+        $id = \PHP_VERSION_ID < 70200 ? \spl_object_hash($timer) : \spl_object_id($timer);
+        return isset($this->timers[$id]);
     }
 
     public function cancel(TimerInterface $timer)