diff --git a/launch/adc_ar_detector.launch b/launch/adc_ar_detector.launch
index b7c0f3771a6c95ed3d47e5684537806c29b87d14..a7d1d723b6e457bd8a8e44e9a20d8385a06ae25a 100644
--- a/launch/adc_ar_detector.launch
+++ b/launch/adc_ar_detector.launch
@@ -5,8 +5,6 @@
   <arg name="launch_prefix"          default=""/>
   <arg name="marker_size"            default="5.0"/>
   <arg name="marker_margin"          default="1.0"/>
-  <arg name="output"                 default="$(arg output)"/>
-  <arg name="launch_prefix"          default="$(arg launch_prefix)"/>
   <arg name="marker_size"            default="5.0"/>
   <arg name="marker_margin"          default="1.0"/>
   <arg name="basler_roi_config_file" default="$(find iri_adc_launch)/config/adc_common/basler_roi_config.yaml"/>