diff --git a/lib/Recur/RRuleIterator.php b/lib/Recur/RRuleIterator.php
index f1fd03e3..84f761bc 100644
--- a/lib/Recur/RRuleIterator.php
+++ b/lib/Recur/RRuleIterator.php
@@ -311,7 +311,7 @@ protected function advanceTheDate(string $interval): void
     /**
      * Does the processing for adjusting the time of multi-hourly events when summer time starts.
      */
-    private function adjustForTimeJumpsOfHourlyEvent(\DateTimeInterface $previousEventDateTime): void
+    protected function adjustForTimeJumpsOfHourlyEvent(\DateTimeInterface $previousEventDateTime): void
     {
         if (0 === $this->hourJump) {
             // Remember if the clock time jumped forward on the next occurrence.