diff --git a/python/ipyleaflet/ipyleaflet/velocity.py b/python/ipyleaflet/ipyleaflet/velocity.py
index 1e277b7a..3947a586 100644
--- a/python/ipyleaflet/ipyleaflet/velocity.py
+++ b/python/ipyleaflet/ipyleaflet/velocity.py
@@ -69,7 +69,7 @@ class Velocity(Layer):
             "displayEmptyString": "No velocity data",
             "speedUnit": "kt",
         }
-    ).tag(sync=True)
+    ).tag(sync=True, o=True)
     min_velocity = Float(0).tag(sync=True, o=True)
     max_velocity = Float(10).tag(sync=True, o=True)
     velocity_scale = Float(0.005).tag(sync=True, o=True)