diff --git a/extensions/positron-python/python_files/positron/positron_ipykernel/connections.py b/extensions/positron-python/python_files/positron/positron_ipykernel/connections.py
index 8a9ed4106a6..2dad51ca0f9 100644
--- a/extensions/positron-python/python_files/positron/positron_ipykernel/connections.py
+++ b/extensions/positron-python/python_files/positron/positron_ipykernel/connections.py
@@ -287,7 +287,7 @@ def _on_comm_close(self, comm_id: str):
         """
         Handles front-end initiated close requests
         """
-        paths = set(self.comm_id_to_path.get(comm_id, set()))
+        paths: Set[PathKey] = set(self.comm_id_to_path.get(comm_id, set()))
 
         if not paths:
             # id the connection is not associated with any variable path, we close it