diff --git a/vessim/actor.py b/vessim/actor.py
index c489aac..475976a 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.
@@ -89,6 +92,10 @@ def state(self, now: datetime) -> dict:
             "nodes": {signal.name: -signal.now(at=now) for signal in self.nodes},
         }
 
+    def finalize(self) -> None:
+        for node in self.nodes:
+            node.finalize()
+
 
 class _ActorSim(mosaik_api_v3.Simulator):
     META = {
diff --git a/vessim/cosim.py b/vessim/cosim.py
index c0765fa..d6d7131 100644
--- a/vessim/cosim.py
+++ b/vessim/cosim.py
@@ -102,6 +102,8 @@ def finalize(self):
         """
         for controller in self.controllers:
             controller.finalize()
+        for actor in self.actors:
+            actor.finalize()
 
 
 class Environment: