diff --git a/config/twist_mux.yaml b/config/twist_mux.yaml
index 2b5b4e7..c3114e5 100644
--- a/config/twist_mux.yaml
+++ b/config/twist_mux.yaml
@@ -10,6 +10,6 @@ twist_mux:
         timeout : 0.5
         priority: 20
       joystick:
-        topic   : /rmp/cmd_vel_joy
+        topic   : "/rmp/cmd_vel_joy"
         timeout : 0.5
         priority: 100
\ No newline at end of file