diff --git a/kuka_rsi_driver/config/controllers.yaml b/kuka_rsi_driver/config/controllers.yaml
index 406931f..3dc8d38 100644
--- a/kuka_rsi_driver/config/controllers.yaml
+++ b/kuka_rsi_driver/config/controllers.yaml
@@ -24,7 +24,7 @@ pose_broadcaster:
 
 status_broadcaster:
   ros__parameters:
-    prefix: $(var prefix)
+    prefix: "$(var prefix)"
 
 joint_trajectory_controller:
   ros__parameters: