diff --git a/direct/src/distributed/DistributedSmoothNodeBase.py b/direct/src/distributed/DistributedSmoothNodeBase.py
index 8b981d3ef9..361a908ba7 100755
--- a/direct/src/distributed/DistributedSmoothNodeBase.py
+++ b/direct/src/distributed/DistributedSmoothNodeBase.py
@@ -64,6 +64,8 @@ class DistributedSmoothNodeBase:
 
     def stopPosHprBroadcast(self):
         taskMgr.remove(self.getPosHprBroadcastTaskName())
+        # Delete this callback because it maintains a reference to self
+        self.d_broadcastPosHpr = None
 
     def startPosHprBroadcast(self, period=.2, stagger=0, type=None):
         BT = DistributedSmoothNodeBase.BroadcastTypes