diff --git a/src/ifcparse/IfcFile.h b/src/ifcparse/IfcFile.h
index d8ea3a47c6..9cddf017cd 100644
--- a/src/ifcparse/IfcFile.h
+++ b/src/ifcparse/IfcFile.h
@@ -135,7 +135,6 @@ private:
 	entities_by_type_t bytype_excl;
 	entities_by_ref_t byref;
 	entities_by_ref_excl_t byref_excl;
-	ref_map_t by_ref_cached_;
 	entity_by_guid_t byguid;
 	entity_entity_map_t entity_file_map;
 
@@ -265,10 +264,6 @@ public:
 		return return_value;
 	}
 
-	/// Marks entity as modified so that potential cache for it is invalidated.
-	/// @todo Currently the whole cache is invalidated. Implement more fine-grained invalidation.
-	void mark_entity_as_modified(int id);
-
 	unsigned int FreshId() { return ++MaxId; }
 
 	unsigned int getMaxId() { return MaxId; }
diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index 89f8af4a0e..b943af05ed 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -1400,8 +1400,6 @@ void IfcEntityInstanceData::setArgument(size_t i, Argument* a, IfcUtil::Argument
 	if (this->file) {
 		register_inverse_visitor visitor(*this->file, *this);
 		apply_individual_instance_visitor(copy, i).apply(visitor);
-
-		this->file->mark_entity_as_modified(id_);
 	}
 
 	attributes_[i] = copy;
@@ -1732,11 +1730,6 @@ aggregate_of_instance::ptr IfcFile::traverse_breadth_first(IfcUtil::IfcBaseClass
 	return IfcParse::traverse_breadth_first(instance, max_level);
 }
 
-void IfcFile::mark_entity_as_modified(int /*id*/)
-{
-	by_ref_cached_.clear();
-}
-
 void IfcFile::addEntities(aggregate_of_instance::ptr es) {
 	for( aggregate_of_instance::it i = es->begin(); i != es->end(); ++ i ) {
 		addEntity(*i);
@@ -1984,10 +1977,6 @@ 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;
 }
 
@@ -2123,7 +2112,6 @@ void IfcFile::process_deletion_() {
 					{
 						byref_excl.erase(name);
 					}
-					by_ref_cached_.erase(name);
 				}
 			}
 		}
@@ -2216,8 +2204,6 @@ void IfcFile::process_deletion_() {
 		}
 	}
 
-	by_ref_cached_.clear();
-
 	batch_deletion_ids_.clear();
 }