diff --git a/turtlebot4_description/urdf/sensors/rplidar.urdf.xacro b/turtlebot4_description/urdf/sensors/rplidar.urdf.xacro
index ff87edd..f07e672 100644
--- a/turtlebot4_description/urdf/sensors/rplidar.urdf.xacro
+++ b/turtlebot4_description/urdf/sensors/rplidar.urdf.xacro
@@ -42,7 +42,7 @@
     -->
     <xacro:ray_sensor sensor_name="${name}" gazebo="${gazebo}" 
                   update_rate="62.0" visualize="1" 
-                  h_samples="640" h_res="1.0" h_min_angle="${-pi}" h_max_angle="0" 
+                  h_samples="640" h_res="1.0" h_min_angle="${-pi}" h_max_angle="${pi}" 
                   r_min="0.164" r_max="12.0" r_res="0.01">
                   <plugin name="dummy" filename="dummyfile"></plugin>
     </xacro:ray_sensor>