diff --git a/src/ifcgeom_schema_agnostic/IfcGeomFilter.h b/src/ifcgeom_schema_agnostic/IfcGeomFilter.h
index 8d4a1192e3..e98e54d972 100644
--- a/src/ifcgeom_schema_agnostic/IfcGeomFilter.h
+++ b/src/ifcgeom_schema_agnostic/IfcGeomFilter.h
@@ -230,6 +230,32 @@ namespace IfcGeom {
             description = ss.str();
         }
     };
+
+	struct instance_id_filter : public filter {
+		std::set<int> instance_ids_;
+
+		instance_id_filter() {}
+		instance_id_filter(bool include, bool traverse, const std::set<int>& instance_ids)
+			: filter(include, traverse)
+			, instance_ids_(instance_ids) {}
+
+		bool match(IfcUtil::IfcBaseEntity* prod) const {
+			return instance_ids_.find(prod->data().id()) != instance_ids_.end();
+		}
+
+		bool operator()(IfcUtil::IfcBaseEntity* prod) const {
+			return filter::match(prod, std::bind(&instance_id_filter::match, this, std::placeholders::_1));
+		}
+
+		void update_description() {
+			std::stringstream ss;
+			ss << (traverse ? "traverse " : "") << (include ? "include" : "exclude") << " ids";
+			for (auto& id : instance_ids_) {
+				ss << " " << id;
+			}
+			description = ss.str();
+		}
+	};
 }
 
 #endif
diff --git a/src/ifcopenshell-python/ifcopenshell/geom/main.py b/src/ifcopenshell-python/ifcopenshell/geom/main.py
index 49f4274e55..f5cffbe269 100644
--- a/src/ifcopenshell-python/ifcopenshell/geom/main.py
+++ b/src/ifcopenshell-python/ifcopenshell/geom/main.py
@@ -97,10 +97,9 @@ class iterator(ifcopenshell_wrapper.Iterator):
                 if not all(inst.is_a("IfcProduct") for inst in include_or_exclude):
                     raise ValueError("include and exclude need to be an aggregate of IfcProduct")
 
-                initializer = ifcopenshell_wrapper.construct_iterator_with_include_exclude_globalid
+                initializer = ifcopenshell_wrapper.construct_iterator_with_include_exclude_id
 
-                decode_unicode = lambda x: x.encode("ascii") if x.__class__.__name__ == "unicode" else x
-                include_or_exclude = list(map(decode_unicode, map(operator.attrgetter("GlobalId"), include_or_exclude)))
+                include_or_exclude = [i.id() for i in include_or_exclude]
             else:
                 initializer = ifcopenshell_wrapper.construct_iterator_with_include_exclude
 
diff --git a/src/ifcwrap/IfcGeomWrapper.i b/src/ifcwrap/IfcGeomWrapper.i
index 815faf49b6..98824e262d 100644
--- a/src/ifcwrap/IfcGeomWrapper.i
+++ b/src/ifcwrap/IfcGeomWrapper.i
@@ -214,10 +214,17 @@ struct ShapeRTTI : public boost::static_visitor<PyObject*>
 		af.include = include;
 		return new IfcGeom::Iterator(settings, file, {af}, num_threads);
 	}
+
+	IfcGeom::Iterator* construct_iterator_with_include_exclude_id(IfcGeom::IteratorSettings settings, IfcParse::IfcFile* file, std::vector<int> elems, bool include, int num_threads) {
+		std::set<int> elems_set(elems.begin(), elems.end());
+		IfcGeom::instance_id_filter af(include, false, elems_set);
+		return new IfcGeom::Iterator(settings, file, {af}, num_threads);
+	}
 %}
 
 %newobject construct_iterator_with_include_exclude;
 %newobject construct_iterator_with_include_exclude_globalid;
+%newobject construct_iterator_with_include_exclude_id;
 
 %extend IfcGeom::Representation::Triangulation {
 	%pythoncode %{