diff --git a/example_13/bringup/launch/three_robots.launch.py b/example_13/bringup/launch/three_robots.launch.py
index e9a1679c..39a3cfee 100644
--- a/example_13/bringup/launch/three_robots.launch.py
+++ b/example_13/bringup/launch/three_robots.launch.py
@@ -88,7 +88,7 @@ def generate_launch_description():
     control_node = Node(
         package="controller_manager",
         executable="ros2_control_node",
-        parameters=[robot_description, robot_controllers],
+        parameters=[robot_controllers],
     )
     robot_state_pub_node = Node(
         package="robot_state_publisher",