diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index b59ac0c887..62ad5a3f00 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -1792,6 +1792,10 @@ IfcUtil::IfcBaseClass* IfcFile::addEntity(IfcUtil::IfcBaseClass* entity, int id)
 		build_inverses_(new_entity);
 	}
 
+	// @todo the id isn't actually used here, but instead
+	// clears the entire inverse cache map.
+	mark_entity_as_modified(0);
+
 	return new_entity;
 }