diff --git a/rosbot_description/urdf/rosbot.urdf.xacro b/rosbot_description/urdf/rosbot.urdf.xacro
index 5d5191eb..6b44b713 100644
--- a/rosbot_description/urdf/rosbot.urdf.xacro
+++ b/rosbot_description/urdf/rosbot.urdf.xacro
@@ -6,7 +6,7 @@
   <xacro:arg name="use_gpu" default="false" />
   <xacro:arg name="mecanum" default="false" />
   <xacro:arg name="simulation_engine" default="" />
-  <xacro:arg name="tf_prefix" default="" />
+  <xacro:arg name="tf_prefix" default="None" />
   <xacro:arg name="namespace" default="" />
 
   <xacro:property name="prefix" value="$(arg tf_prefix)" lazy_eval="false"/>