diff --git a/msg/PeopleScene.msg b/msg/PeopleScene.msg
index 173dc62..5aaa8c4 100644
--- a/msg/PeopleScene.msg
+++ b/msg/PeopleScene.msg
@@ -1,4 +1,5 @@
 sensor_msgs/Image scene_image               # store scene image which contain people
 mas_perception_msgs/Person[] people         # list of people in scene
 sensor_msgs/RegionOfInterest[] face_rois    # bounding boxes of people's faces
-sensor_msgs/RegionOfInterest[] body_rois    # bounding boxes of people's full body
\ No newline at end of file
+sensor_msgs/RegionOfInterest[] body_rois    # bounding boxes of people's full body
+uint32 num_detected_people                  # should match the length of 'people' and ROI fields
diff --git a/msg/Person.msg b/msg/Person.msg
index 04a5af0..32d82b6 100644
--- a/msg/Person.msg
+++ b/msg/Person.msg
@@ -1,4 +1,5 @@
-string identity
+string identity                         # unique string that identify the person
+string name                             # given name, e.g. 'John Doe'
 float32 age
 mas_perception_msgs/Face face
 sensor_msgs/Image body_image            # extracted RGB image of the person