diff --git a/osi_detectedobject.proto b/osi_detectedobject.proto
index 41d0f240b..f7a1222dc 100644
--- a/osi_detectedobject.proto
+++ b/osi_detectedobject.proto
@@ -63,6 +63,34 @@ message DetectedItemHeader
     //
     repeated Identifier sensor_id = 6;
 
+    // Additional data that is specific to radar sensors.
+    //
+    // \note Field needs not to be set if simulated sensor is not a radar
+    // sensor.
+    //
+    optional RadarSpecificObjectData radar_specifics = 100;
+
+    // Additional data that is specific to lidar sensors.
+    //
+    // \note Field needs not to be set if simulated sensor is not a lidar
+    // sensor.
+    //
+    optional LidarSpecificObjectData lidar_specifics = 101;
+
+    // Additional data that is specific to camera sensors.
+    //
+    // \note Field needs not to be set if simulated sensor is not a camera
+    // sensor.
+    //
+    optional CameraSpecificObjectData camera_specifics = 102;
+
+    // Additional data that is specific to ultrasonic sensors.
+    //
+    // \note Field needs not to be set if simulated sensor is not an ultrasonic
+    // sensor.
+    //
+    optional UltrasonicSpecificObjectData ultrasonic_specifics = 103;
+
     // Definition of measurement states.
     //
     enum MeasurementState
@@ -221,34 +249,6 @@ message DetectedMovingObject
     //
     optional ColorDescription color_description = 9;
 
-    // Additional data that is specific to radar sensors.
-    //
-    // \note Field needs not to be set if simulated sensor is not a radar
-    // sensor.
-    //
-    optional RadarSpecificObjectData radar_specifics = 100;
-
-    // Additional data that is specific to lidar sensors.
-    //
-    // \note Field needs not to be set if simulated sensor is not a lidar
-    // sensor.
-    //
-    optional LidarSpecificObjectData lidar_specifics = 101;
-
-    // Additional data that is specific to camera sensors.
-    //
-    // \note Field needs not to be set if simulated sensor is not a camera
-    // sensor.
-    //
-    optional CameraSpecificObjectData camera_specifics = 102;
-
-    // Additional data that is specific to ultrasonic sensors.
-    //
-    // \note Field needs not to be set if simulated sensor is not an ultrasonic
-    // sensor.
-    //
-    optional UltrasonicSpecificObjectData ultrasonic_specifics = 103;
-
     //
     // \brief A candidate for a detected moving object as estimated by the
     // sensor.