diff --git a/src/ifcopenshell-python/test/api/project/test_append_asset.py b/src/ifcopenshell-python/test/api/project/test_append_asset.py
index 7ba94d79b9..c3ef86efcf 100644
--- a/src/ifcopenshell-python/test/api/project/test_append_asset.py
+++ b/src/ifcopenshell-python/test/api/project/test_append_asset.py
@@ -23,7 +23,7 @@ import ifcopenshell.api.pset
 import ifcopenshell.api.root
 import ifcopenshell.api.type
 import ifcopenshell.api.cost
-import ifcopenshell.api.void
+import ifcopenshell.api.feature
 import ifcopenshell.api.style
 import ifcopenshell.api.context
 import ifcopenshell.api.project
@@ -378,7 +378,7 @@ class TestAppendAssetIFC2X3(test.bootstrap.IFC2X3):
         library = ifcopenshell.api.project.create_file(version=self.file.schema)
         element = ifcopenshell.api.root.create_entity(library, ifc_class="IfcWall")
         opening = ifcopenshell.api.root.create_entity(library, ifc_class="IfcOpeningElement")
-        ifcopenshell.api.void.add_opening(library, opening=opening, element=element)
+        ifcopenshell.api.feature.add_feature(library, feature=opening, element=element)
         ifcopenshell.api.project.append_asset(self.file, library=library, element=element)
         assert self.file.by_type("IfcWall")[0].HasOpenings[0].RelatedOpeningElement.is_a("IfcOpeningElement")
 
diff --git a/src/pyodide/demo-app/context.py b/src/pyodide/demo-app/context.py
index ede71bac7f..682aab7589 100644
--- a/src/pyodide/demo-app/context.py
+++ b/src/pyodide/demo-app/context.py
@@ -1,4 +1,5 @@
 import ifcopenshell
+import ifcopenshell.api.feature
 import ifcopenshell.geom
 import ifcopenshell.api
 import ifcopenshell.util.unit
@@ -290,12 +291,8 @@ class Context:
             ]
         )
 
-        ifcopenshell.api.run(
-            "void.add_opening", self.model, opening=opening, element=wall
-        )
-        ifcopenshell.api.run(
-            "void.add_filling", self.model, opening=opening, element=door
-        )
+        ifcopenshell.api.feature.add_feature(self.model, feature=opening, element=wall)
+        ifcopenshell.api.feature.add_filling(self.model, opening=opening, element=door)
 
         z_offsets = {
             'door': 0,