diff --git a/src/utils/ReversePriorityQueue.php b/src/utils/ReversePriorityQueue.php
index 76e648231..53fd0f08a 100644
--- a/src/utils/ReversePriorityQueue.php
+++ b/src/utils/ReversePriorityQueue.php
@@ -38,6 +38,7 @@ class ReversePriorityQueue extends \SplPriorityQueue{
 	 *
 	 * @return int
 	 */
+	#[\ReturnTypeWillChange]
 	public function compare($priority1, $priority2){
 		//TODO: this will crash if non-numeric priorities are used
 		return (int) -($priority1 - $priority2);