diff --git a/src/backend/sql_agents/helpers/comms_manager.py b/src/backend/sql_agents/helpers/comms_manager.py
index fddc0a7a..da6c9c6c 100644
--- a/src/backend/sql_agents/helpers/comms_manager.py
+++ b/src/backend/sql_agents/helpers/comms_manager.py
@@ -79,6 +79,8 @@ async def select_agent(self, agents, history):
                         ),
                         None,
                     )
+            # No matching case found, so explicitly return None
+            return None
 
     # class for termination strategy
     class ApprovalTerminationStrategy(TerminationStrategy):