diff --git a/nebula_ros/launch/continental_launch_all_hw.xml b/nebula_ros/launch/continental_launch_all_hw.xml
index 8c26954b4..ac82f548c 100644
--- a/nebula_ros/launch/continental_launch_all_hw.xml
+++ b/nebula_ros/launch/continental_launch_all_hw.xml
@@ -15,7 +15,7 @@
 
         <node pkg="nebula_ros" exec="continental_ars548_ros_wrapper_node" name="nebula_continental_ars548" output="screen">
             <param from="$(var config_file)" allow_substs="true"/>
-            <param name="launch_hw" value="$(var launch_hw)"></param>
+            <param name="launch_hw" value="$(var launch_hw)"/>
             <remap from="/diagnostics" to="diagnostics"/>
             <remap from="odometry_input" to="$(var odometry_topic)"/>
             <remap from="acceleration_input" to="$(var acceleration_topic)"/>
@@ -27,7 +27,7 @@
 
         <node pkg="nebula_ros" exec="continental_srr520_ros_wrapper_node" name="nebula_continental_srr520" output="screen">
 	        <param from="$(var config_file)" allow_substs="true"/>
-            <param name="launch_hw" value="$(var launch_hw)"></param>
+            <param name="launch_hw" value="$(var launch_hw)"/>
             <remap from="/diagnostics" to="diagnostics"/>
             <remap from="odometry_input" to="$(var odometry_topic)"/>
             <remap from="acceleration_input" to="$(var acceleration_topic)"/>
diff --git a/nebula_ros/launch/hesai_launch_all_hw.xml b/nebula_ros/launch/hesai_launch_all_hw.xml
index c9243a003..d232229c8 100644
--- a/nebula_ros/launch/hesai_launch_all_hw.xml
+++ b/nebula_ros/launch/hesai_launch_all_hw.xml
@@ -9,7 +9,7 @@
 
   <node pkg="nebula_ros" exec="hesai_ros_wrapper_node" name="hesai_ros_wrapper_node" output="screen">
     <param from="$(var config_file)" allow_substs="true"/>
-    <param name="launch_hw" value="$(var launch_hw)"></param>
+    <param name="launch_hw" value="$(var launch_hw)"/>
   </node>
 
 </launch>
diff --git a/nebula_ros/launch/robosense_launch_all_hw.xml b/nebula_ros/launch/robosense_launch_all_hw.xml
index 7f2c88fc3..d56495e8d 100644
--- a/nebula_ros/launch/robosense_launch_all_hw.xml
+++ b/nebula_ros/launch/robosense_launch_all_hw.xml
@@ -9,7 +9,7 @@
 
   <node pkg="nebula_ros" exec="robosense_ros_wrapper_node" name="robosense_ros_wrapper_node" output="screen">
     <param from="$(var config_file)" allow_substs="true"/>
-    <param name="launch_hw" value="$(var launch_hw)"></param>
+    <param name="launch_hw" value="$(var launch_hw)"/>
   </node>
 
 </launch>
diff --git a/nebula_ros/launch/velodyne_launch_all_hw.xml b/nebula_ros/launch/velodyne_launch_all_hw.xml
index 7eaff1af7..b6c786eb9 100644
--- a/nebula_ros/launch/velodyne_launch_all_hw.xml
+++ b/nebula_ros/launch/velodyne_launch_all_hw.xml
@@ -9,7 +9,7 @@
 
   <node pkg="nebula_ros" exec="velodyne_ros_wrapper_node" name="velodyne_ros_wrapper_node" output="screen">
     <param from="$(var config_file)" allow_substs="true"/>
-    <param name="launch_hw" value="$(var launch_hw)"></param>
+    <param name="launch_hw" value="$(var launch_hw)"/>
   </node>
 
 </launch>