diff --git a/src/ifcwrap/IfcParseWrapper.i b/src/ifcwrap/IfcParseWrapper.i
index 8fa479cfec..36e911b56f 100644
--- a/src/ifcwrap/IfcParseWrapper.i
+++ b/src/ifcwrap/IfcParseWrapper.i
@@ -62,6 +62,7 @@
 
 %ignore express::Base::is;
 %ignore express::Base::operator==;
+%ignore express::Base::Base(std::nullopt_t);
 
 %rename("by_id") instance_by_id;
 %rename("by_guid") instance_by_guid;