diff --git a/description/robot_core.xacro b/description/robot_core.xacro
index 5a2f2b1..c509ba3 100644
--- a/description/robot_core.xacro
+++ b/description/robot_core.xacro
@@ -229,7 +229,7 @@
     <joint name="laser_joint" type="fixed">
         <parent link="chassis_link"/>
         <child link="laser_frame"/>
-        <origin xyz="${0.075 - 0.15285} 0 ${0.030}" rpy="0 0 ${pi}"/>
+        <origin xyz="${0.075 - 0.15285} 0 0.030" rpy="0 0 ${pi}"/>
     </joint>