diff --git a/src/ifcgeom/IfcGeomIteratorImplementation.h b/src/ifcgeom/IfcGeomIteratorImplementation.h
index aff570af0b..019118be6c 100644
--- a/src/ifcgeom/IfcGeomIteratorImplementation.h
+++ b/src/ifcgeom/IfcGeomIteratorImplementation.h
@@ -970,7 +970,7 @@ namespace IfcGeom {
 				delete ifc_file;
 			}
 
-			if (settings.get(IfcGeom::IteratorSettings::DISABLE_TRIANGULATION)) {
+			if (!settings.get(IfcGeom::IteratorSettings::DISABLE_TRIANGULATION)) {
 				for (auto& p : all_processed_native_elements_) {
 					delete p;
 				}