diff --git a/src/core/clock.ml b/src/core/clock.ml
index dd236092a6..762c125416 100644
--- a/src/core/clock.ml
+++ b/src/core/clock.ml
@@ -284,7 +284,8 @@ let unify =
 let () =
   Lifecycle.before_core_shutdown ~name:"Clocks stop" (fun () ->
       Atomic.set global_stop true;
-      Queue.iter active_clocks stop)
+      Queue.iter active_clocks stop;
+      WeakQueue.iter passive_clocks stop)
 
 let _animated_sources { outputs; active_sources } =
   Queue.elements outputs @ WeakQueue.elements active_sources