diff --git a/osi_object.proto b/osi_object.proto
index fc73e5941..e9faaabf2 100644
--- a/osi_object.proto
+++ b/osi_object.proto
@@ -865,6 +865,10 @@ message MovingObject
             // Vehicle is a wheelchair.
             //
             TYPE_WHEELCHAIR = 15;
+
+            // Object is a Tricycle.
+            //
+            TYPE_TRICYCLE = 17;
         }
 
         //