--- a/src/ai/api/ai_vehicle.cpp	Mon Jun 23 12:33:38 2008 +0000
+++ b/src/ai/api/ai_vehicle.cpp	Mon Jun 23 12:46:38 2008 +0000
@@ -276,3 +276,10 @@
 
 	return amount;
 }
+
+/* static */ GroupID AIVehicle::GetGroupID(VehicleID vehicle_id)
+{
+	if (!IsValidVehicle(vehicle_id)) return ::INVALID_GROUP;
+
+	return ::GetVehicle(vehicle_id)->group_id;
+}