diff --git a/Assets/UnitySensorsROS/Runtime/Scripts/Serializers/Tf2Msgs/TFMessageMsgSerializer.cs b/Assets/UnitySensorsROS/Runtime/Scripts/Serializers/Tf2Msgs/TFMessageMsgSerializer.cs
index e5b199de..a894cdbc 100644
--- a/Assets/UnitySensorsROS/Runtime/Scripts/Serializers/Tf2Msgs/TFMessageMsgSerializer.cs
+++ b/Assets/UnitySensorsROS/Runtime/Scripts/Serializers/Tf2Msgs/TFMessageMsgSerializer.cs
@@ -38,7 +38,10 @@ public override TFMessageMsg Serialize()
                 TransformStampedMsg transform = new TransformStampedMsg();
                 transform.header = new HeaderMsg();
                 transform.header.stamp = headerMsg.stamp;
+#if ROS2
+#else
                 transform.header.seq = headerMsg.seq;
+#endif
                 transform.header.frame_id = data.frame_id_parent;
                 transform.child_frame_id = data.frame_id_child;
                 transform.transform.translation = data.position.To<FLU>();