diff --git a/src/ifcgeom_schema_agnostic/wire_utils.cpp b/src/ifcgeom_schema_agnostic/wire_utils.cpp
index ab12ea76f2..b2a2eb50b0 100644
--- a/src/ifcgeom_schema_agnostic/wire_utils.cpp
+++ b/src/ifcgeom_schema_agnostic/wire_utils.cpp
@@ -84,7 +84,7 @@ bool IfcGeom::util::approximate_plane_through_wire(const TopoDS_Wire& wire, gp_P
 	// the given points to the constructed plane. When doing triangulation and
 	// obtaining a 2d points for the Delaunay, infinity is passed here, so this
 	// can't for assessing degenerativeness.
-	if (v.SquareMagnitude() < 1.e-7) {
+	if (v.Magnitude() < 1.e-7) {
 		Logger::Warning("Degenerate face boundary in normal estimation");
 		return false;
 	}