diff --git a/source/RobotAPI/components/units/RobotUnit/Units/PlatformSubUnit.h b/source/RobotAPI/components/units/RobotUnit/Units/PlatformSubUnit.h
index 07dfb37a3008639acf593a0f8a1c2c26724927e4..1da5ebcaed1de3f106c86d776dd1a0787aa3c2bf 100755
--- a/source/RobotAPI/components/units/RobotUnit/Units/PlatformSubUnit.h
+++ b/source/RobotAPI/components/units/RobotUnit/Units/PlatformSubUnit.h
@@ -64,6 +64,7 @@ namespace armarx
         // PlatformUnit interface
         void onInitPlatformUnit()  override
         {
+            usingTopic("PlatformState");
         }
         void onStartPlatformUnit() override
         {