diff --git a/src/ifcgeom/Serialization/schema/Serialization.cpp b/src/ifcgeom/Serialization/schema/Serialization.cpp
index 611238cfaa..96ff0c86b5 100644
--- a/src/ifcgeom/Serialization/schema/Serialization.cpp
+++ b/src/ifcgeom/Serialization/schema/Serialization.cpp
@@ -537,7 +537,7 @@ int convert_to_ifc(const TopoDS_Face& f, IfcSchema::IfcFace*& face, bool advance
 			return 0;
 		}
 		IfcSchema::IfcFaceBound* bnd;
-		if (outer == f) {
+		if (outer == exp.Current()) {
 			bnd = new IfcSchema::IfcFaceOuterBound(loop, true);
 		} else {
 			bnd = new IfcSchema::IfcFaceBound(loop, true);