diff --git a/launch/rtabmap.launch b/launch/rtabmap.launch
index e5396c43..b8c82951 100644
--- a/launch/rtabmap.launch
+++ b/launch/rtabmap.launch
@@ -229,7 +229,7 @@
   
     <!-- Visual SLAM (robot side) -->
     <!-- args: "delete_db_on_start" and "udebug" -->
-    <node name="rtabmap" pkg="rtabmap_ros" type="rtabmap" output="$(arg output)" args="$(arg rtabmap_args)" launch-prefix="">
+    <node name="rtabmap" pkg="rtabmap_ros" type="rtabmap" output="$(arg output)" args="$(arg rtabmap_args)" launch-prefix="$(arg launch_prefix)">
       <param     if="$(arg stereo)" name="subscribe_depth"  type="bool" value="false"/>
       <param unless="$(arg stereo)" name="subscribe_depth"  type="bool" value="true"/>
       <param name="subscribe_rgbd"       type="bool"   value="$(arg subscribe_rgbd)"/>