diff --git a/msg/Detection2D.msg b/msg/Detection2D.msg
index e924ba8..daa3b87 100644
--- a/msg/Detection2D.msg
+++ b/msg/Detection2D.msg
@@ -16,10 +16,6 @@ BoundingBox2D bbox
 #   the image). Not required for all use cases, so it may be empty.
 sensor_msgs/Image source_img
 
-# If true, this message contains object tracking information.
-bool is_tracking
-
 # ID used for consistency across multiple detection messages. This value will
 #   likely differ from the id field set in each individual ObjectHypothesis.
-# If you set this field, be sure to also set is_tracking to True.
 string tracking_id
diff --git a/msg/Detection3D.msg b/msg/Detection3D.msg
index 6619167..ec9679d 100644
--- a/msg/Detection3D.msg
+++ b/msg/Detection3D.msg
@@ -18,10 +18,6 @@ BoundingBox3D bbox
 #   be empty.
 sensor_msgs/PointCloud2 source_cloud
 
-# If this message was tracking result, this field set true.
-bool is_tracking
-
 # ID used for consistency across multiple detection messages. This value will
 #   likely differ from the id field set in each individual ObjectHypothesis.
-# If you set this field, be sure to also set is_tracking to True.
 string tracking_id