diff --git a/src/ifcgeom/kernels/cgal/CgalConversionResult.cpp b/src/ifcgeom/kernels/cgal/CgalConversionResult.cpp
index 2fbdb0a307..dfdb962fd3 100644
--- a/src/ifcgeom/kernels/cgal/CgalConversionResult.cpp
+++ b/src/ifcgeom/kernels/cgal/CgalConversionResult.cpp
@@ -382,6 +382,7 @@ void ifcopenshell::geometry::CgalShape::Triangulate(ifcopenshell::geometry::Sett
 	}
 
 	const bool setting_use_original_edges = settings.get<ifcopenshell::geometry::settings::CgalEmitOriginalEdges>().get();
+	const bool calculate_normals = !settings.get<ifcopenshell::geometry::settings::DontEmitNormals>().get();
 	
 	std::set<std::set<Kernel_::Point_3>> original_edges;
 	if (setting_use_original_edges) {
@@ -541,11 +542,13 @@ void ifcopenshell::geometry::CgalShape::Triangulate(ifcopenshell::geometry::Sett
 				);
 				welds.insert({ pn, vidx });
 
-				auto nx = CGAL::to_double(face_normals_map[face].cartesian(0));
-				auto ny = CGAL::to_double(face_normals_map[face].cartesian(1));
-				auto nz = CGAL::to_double(face_normals_map[face].cartesian(2));
+				if (calculate_normals) {
+					auto nx = CGAL::to_double(face_normals_map[face].cartesian(0));
+					auto ny = CGAL::to_double(face_normals_map[face].cartesian(1));
+					auto nz = CGAL::to_double(face_normals_map[face].cartesian(2));
 
-				t->addNormal(nx, ny, nz);
+					t->addNormal(nx, ny, nz);
+				}
 			} else {
 				vidx = it->second;
 			}