diff --git a/demos/hello_wolf/sensor_range_bearing.cpp b/demos/hello_wolf/sensor_range_bearing.cpp
index 9c4dc62b50a204f31dc83a5371f1856a453f43be..306ca2d5c93664b078ec43290af6786412b1ca0c 100644
--- a/demos/hello_wolf/sensor_range_bearing.cpp
+++ b/demos/hello_wolf/sensor_range_bearing.cpp
@@ -25,7 +25,7 @@ namespace wolf
 WOLF_PTR_TYPEDEFS(SensorRangeBearing);
 
 SensorRangeBearing::SensorRangeBearing(const YAML::Node& _params)
-    : SensorBase("SensorRangeBearing", 2, {{'P', "StatePoint2d"}, {'O', "StateAngle"}}, _params),
+    : SensorBase("SensorRangeBearing", {{'P', "StatePoint2d"}, {'O', "StateAngle"}}, _params),
       noise_range_metres_std_(_params["noise_range_metres_std"].as<double>()),
       noise_bearing_degrees_std_(_params["noise_bearing_degrees_std"].as<double>())
 {