diff --git a/src/newgrf_object.h b/src/newgrf_object.h
--- a/src/newgrf_object.h
+++ b/src/newgrf_object.h
@@ -104,7 +104,17 @@ struct ObjectScopeResolver : public Scop
 	TileIndex tile;     ///< The tile related to the object.
 	uint8 view;         ///< The view of the object.
 
-	ObjectScopeResolver(ResolverObject &ro, Object *obj, TileIndex tile, uint8 view = 0);
+	/**
+	 * Constructor of an object scope resolver.
+	 * @param ro Surrounding resolver.
+	 * @param obj Object being resolved.
+	 * @param tile %Tile of the object.
+	 * @param view View of the object.
+	 */
+	ObjectScopeResolver(ResolverObject &ro, Object *obj, TileIndex tile, uint8 view = 0)
+		: ScopeResolver(ro), obj(obj), tile(tile), view(view)
+	{
+	}
 
 	/* virtual */ uint32 GetRandomBits() const;
 	/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;