diff --git a/ed_sensor_integration/tools/README.md b/ed_sensor_integration/tools/README.md
index 85b82fb4..a937c412 100644
--- a/ed_sensor_integration/tools/README.md
+++ b/ed_sensor_integration/tools/README.md
@@ -34,7 +34,7 @@ rosrun ed_sensor_integration ed_fitter_data <stamp>.json <worldmodel_name> <enti
 * `ed_segmenter`: Iterates over snapshots in a directory, performs a Kinect update and displays the result. To run:
 
 ```bash
-rosrun ed_sensor_integration ed_segmenter <stamp>.json
+rosrun ed_sensor_integration ed_segmenter <stamp>.json [worldmodel name] [entity to segment on]
 ```
 
 This includes the entire 'update' sequence, including (but not limited to):