diff --git a/RNS/Interfaces/LocalInterface.py b/RNS/Interfaces/LocalInterface.py
index a6578ab..23fd068 100644
--- a/RNS/Interfaces/LocalInterface.py
+++ b/RNS/Interfaces/LocalInterface.py
@@ -272,7 +272,8 @@ class LocalClientInterface(Interface):
             RNS.Transport.local_client_interfaces.remove(self)
             if hasattr(self, "parent_interface") and self.parent_interface != None:
                 self.parent_interface.clients -= 1
-                RNS.Transport.owner._should_persist_data()
+                if hasattr(RNS.Transport, "owner") and RNS.Transport.owner != None:
+                    RNS.Transport.owner._should_persist_data()
 
         if nowarning == False:
             RNS.log("The interface "+str(self)+" experienced an unrecoverable error and is being torn down. Restart Reticulum to attempt to open this interface again.", RNS.LOG_ERROR)