diff -r e2080ac44039 -r 488d0ba6070b src/linetypes/quadrilateral.h
--- a/src/linetypes/quadrilateral.h	Fri Sep 17 22:43:22 2021 +0300
+++ b/src/linetypes/quadrilateral.h	Tue Sep 21 16:00:15 2021 +0300
@@ -13,4 +13,5 @@
 	QString textRepresentation() const override;
 	void getPolygons(std::vector<gl::Polygon>& polygons, GetPolygonsContext* context) const override;
 	void invert() override;
+	Type typeIdentifier() const override;
 };