diff --git a/src/object.h b/src/object.h
--- a/src/object.h
+++ b/src/object.h
@@ -20,7 +20,6 @@ void UpdateCompanyHQ(TileIndex tile, uin
 
 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner = OWNER_NONE, struct Town *town = NULL, uint8 view = 0);
 
-void PlaceProc_Object(TileIndex tile);
-void ShowBuildObjectPicker(struct Window *w);
+void ShowBuildObjectPicker();
 
 #endif /* OBJECT_H */