diff --git a/launch/ur10_bringup.launch b/launch/ur10_bringup.launch
index 8b09201..58f7abd 100644
--- a/launch/ur10_bringup.launch
+++ b/launch/ur10_bringup.launch
@@ -17,7 +17,6 @@
   <!-- robot model -->
   <include file="$(find ur_description)/launch/ur10_upload.launch">
     <arg name="limited" value="$(arg limited)"/>
-    <arg name="prefix" value="$(arg prefix)" />
   </include>
   
   <!-- ur common -->
diff --git a/launch/ur10_ros_control.launch b/launch/ur10_ros_control.launch
index bbf576a..3004def 100644
--- a/launch/ur10_ros_control.launch
+++ b/launch/ur10_ros_control.launch
@@ -15,7 +15,6 @@
   <!-- robot model -->
   <include file="$(find ur_description)/launch/ur10_upload.launch">
     <arg name="limited" value="$(arg limited)"/>
-    <arg name="prefix" value="$(arg prefix)" />
   </include>
 
 
diff --git a/launch/ur3_bringup.launch b/launch/ur3_bringup.launch
index 9d267e1..9e7986d 100644
--- a/launch/ur3_bringup.launch
+++ b/launch/ur3_bringup.launch
@@ -17,7 +17,6 @@
   <!-- robot model -->
   <include file="$(find ur_description)/launch/ur3_upload.launch">
     <arg name="limited" value="$(arg limited)"/>
-    <arg name="prefix" value="$(arg prefix)" />
   </include>
 
   <!-- ur common -->
diff --git a/launch/ur3_ros_control.launch b/launch/ur3_ros_control.launch
index c9a7fd2..7150955 100644
--- a/launch/ur3_ros_control.launch
+++ b/launch/ur3_ros_control.launch
@@ -15,7 +15,6 @@
   <!-- robot model -->
   <include file="$(find ur_description)/launch/ur3_upload.launch">
     <arg name="limited" value="$(arg limited)"/>
-    <arg name="prefix" value="$(arg prefix)" />
   </include>
 
 
diff --git a/launch/ur5_bringup.launch b/launch/ur5_bringup.launch
index a097d4e..eeaa318 100644
--- a/launch/ur5_bringup.launch
+++ b/launch/ur5_bringup.launch
@@ -17,7 +17,6 @@
   <!-- robot model -->
   <include file="$(find ur_description)/launch/ur5_upload.launch">
     <arg name="limited" value="$(arg limited)"/>
-    <arg name="prefix" value="$(arg prefix)" />
   </include>
   
   <!-- ur common -->
diff --git a/launch/ur5_ros_control.launch b/launch/ur5_ros_control.launch
index 301ffea..d73ae7f 100644
--- a/launch/ur5_ros_control.launch
+++ b/launch/ur5_ros_control.launch
@@ -15,7 +15,6 @@
   <!-- robot model -->
   <include file="$(find ur_description)/launch/ur5_upload.launch">
     <arg name="limited" value="$(arg limited)"/>
-    <arg name="prefix" value="$(arg prefix)" />
   </include>