diff --git a/launch/tier4_simulator_launch/launch/simulator.launch.xml b/launch/tier4_simulator_launch/launch/simulator.launch.xml
index 8ee3809cb19d..3c5fab58212e 100644
--- a/launch/tier4_simulator_launch/launch/simulator.launch.xml
+++ b/launch/tier4_simulator_launch/launch/simulator.launch.xml
@@ -147,7 +147,7 @@
   <!-- Diagnostic Converter -->
   <group if="$(var launch_diagnostic_converter)">
     <node name="diagnostic_converter" exec="diagnostic_converter" pkg="diagnostic_converter" output="screen">
-      <param name="diagnostic_topics" value="[/planning/planning_evaluator/metrics, /diagnostic/control_evaluator/metrics, /diagnostics_err]"/>
+      <param name="diagnostic_topics" value="[/planning/planning_evaluator/metrics, /control/control_evaluator/metrics, /diagnostics_err]"/>
     </node>
   </group>