diff --git a/launch/dummy-cell_ceti-table-1-placeworld.launch b/launch/dummy-cell_ceti-table-1-placeworld.launch
index 82298a98fd6eb105e4f32c3507d9659173068762..b8192079dbe18a02664b30cf32c23563f0158d34 100644
--- a/launch/dummy-cell_ceti-table-1-placeworld.launch
+++ b/launch/dummy-cell_ceti-table-1-placeworld.launch
@@ -7,7 +7,7 @@
     <param name="/connector_node_ros_ccf/topics/command" value="/ceti_cell_placeworld/command"/>
 
     <node pkg="ccf_immersive_sorting" type="dummy_sorting_controller" name="ceti_cell_2_placeworld" output="screen">
-        <param name="arm" type="string" value="arm2"/>
+        <param name="arm" type="string" value="arm1"/>
         <param name="other_cell" type="string" value="/ceti_cell_placeworld/scene/update"/>
         <param name="mqtt_server" type="yaml" value="$(arg mqtt_server)"/>
         <param name="scene" type="string" value="$(find ccf_immersive_sorting)/config/config_scene_ceti-table-placeworld.json"/>