diff --git a/api/routes/telephony.py b/api/routes/telephony.py
index 29b62359..827b0cbf 100644
--- a/api/routes/telephony.py
+++ b/api/routes/telephony.py
@@ -686,9 +686,6 @@ async def _handle_telephony_websocket(
         except RuntimeError:
             # WebSocket already closed, ignore
             pass
-    finally:
-        await call_concurrency.unregister_active_call(workflow_run_id)
-
 
 @router.post("/inbound/run")
 async def handle_inbound_run(request: Request):
diff --git a/api/tests/test_telephony_routes.py b/api/tests/test_telephony_routes.py
index 24d8a7d8..f92c63d3 100644
--- a/api/tests/test_telephony_routes.py
+++ b/api/tests/test_telephony_routes.py
@@ -393,4 +393,4 @@ async def test_smallwebrtc_run_reaching_telephony_websocket_closes_without_runni
     )
     assert mock_db.update_workflow_run.await_count == 0
     assert provider_lookup.await_count == 0
-    mock_concurrency.unregister_active_call.assert_awaited_once_with(501)
+    mock_concurrency.unregister_active_call.assert_not_awaited()