diff --git a/autoware_launch/config/perception/traffic_light_arbiter/traffic_light_arbiter.param.yaml b/autoware_launch/config/perception/traffic_light_arbiter/traffic_light_arbiter.param.yaml
index f6263c621a..0c23c7b81d 100644
--- a/autoware_launch/config/perception/traffic_light_arbiter/traffic_light_arbiter.param.yaml
+++ b/autoware_launch/config/perception/traffic_light_arbiter/traffic_light_arbiter.param.yaml
@@ -3,3 +3,4 @@
     external_time_tolerance: 5.0
     perception_time_tolerance: 1.0
     external_priority: true
+    enable_signal_matching: true