diff --git a/smarts/core/sensors/__init__.py b/smarts/core/sensors/__init__.py
index 493d2db7d8..1eb9fddd3f 100644
--- a/smarts/core/sensors/__init__.py
+++ b/smarts/core/sensors/__init__.py
@@ -285,7 +285,6 @@ def process_serialization_safe_sensors(
         )
         if neighborhood_vehicle_states_sensor:
             neighborhood_vehicle_states = []
-            interface = sim_frame.agent_interfaces.get(agent_id)
             interest_pattern = (
                 interface.done_criteria.interest.actors_pattern
                 if interface is not None