diff --git a/vessim/actor.py b/vessim/actor.py
index c489aac..0180d94 100644
--- a/vessim/actor.py
+++ b/vessim/actor.py
@@ -49,6 +49,9 @@ def state(self, now: datetime) -> dict:
             "p": self.p(now),
         }
 
+    def finalize(self) -> None:
+        self.signal.finalize()
+
 
 class ComputingSystem(ActorBase):
     """Model of the computing system.