diff --git a/src/articulated_vehicles.h b/src/articulated_vehicles.h
new file mode 100644
--- /dev/null
+++ b/src/articulated_vehicles.h
@@ -0,0 +1,11 @@
+/* $Id$ */
+
+/** @file articulated_vehicles.h */
+
+#ifndef ARTICULATED_VEHICLES_H
+#define ARTICULATED_VEHICLES_H
+
+uint CountArticulatedParts(EngineID engine_type);
+void AddArticulatedParts(Vehicle **vl);
+
+#endif /* ARTICULATED_VEHICLES_H */