diff --git a/repos/base/src/lib/timeout/timeout.cc b/repos/base/src/lib/timeout/timeout.cc
index 97c832f245..feea5d6b7e 100644
--- a/repos/base/src/lib/timeout/timeout.cc
+++ b/repos/base/src/lib/timeout/timeout.cc
@@ -418,6 +418,7 @@ void Alarm_timeout_scheduler::_alarm_discard(Alarm *alarm)
 
 		/* get anyone using this out of '_alarm_get_pending_alarm'() finally */
 		Mutex::Guard alarm_guard(alarm->_dispatch_mutex);
+		alarm->_delete = false;
 	}
 }