diff --git a/launch/robot_navigation.launch.py b/launch/robot_navigation.launch.py
index 3a16439..c6fd25b 100644
--- a/launch/robot_navigation.launch.py
+++ b/launch/robot_navigation.launch.py
@@ -73,7 +73,7 @@ def generate_launch_description():
 
     declare_namespace_cmd = DeclareLaunchArgument(
         'namespace',
-        default_value='rmp',
+        default_value='/rmp',
         description='Top-level namespace')
 
     declare_use_sim_time_cmd = DeclareLaunchArgument(