diff --git a/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi b/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi
index 323200b9fb..ac5cb061b9 100644
--- a/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi
+++ b/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi
@@ -1812,8 +1812,8 @@ def open(fn: str, readonly: bool = False, logger=None) -> file: ...
 def parse_ifcxml(filename, logger=None): ...
 def polygons_to_svg(*args): ...
 def read(data): ...
-def register_schema(arg1): ...
-def schema_by_name(arg1: str) -> schema_definition: ...
+def register_schema(schema: schema_definition) -> None: ...
+def schema_by_name(schema_name: str) -> schema_definition: ...
 def schema_names() -> tuple[str, ...]: ...
 def serialise(schema_name, shape_str, advanced=True): ...
 def set_feature(x, v): ...
diff --git a/src/ifcparse/IfcSchema.h b/src/ifcparse/IfcSchema.h
index dce8a43348..bc7bb0e40a 100644
--- a/src/ifcparse/IfcSchema.h
+++ b/src/ifcparse/IfcSchema.h
@@ -513,11 +513,11 @@ class IFC_PARSE_API schema_definition {
     IfcUtil::IfcBaseClass* instantiate(const IfcParse::declaration* decl, IfcEntityInstanceData&& data) const;
 };
 
-IFC_PARSE_API const schema_definition* schema_by_name(const std::string&);
+IFC_PARSE_API const schema_definition* schema_by_name(const std::string& schema_name);
 
 IFC_PARSE_API std::vector<std::string> schema_names();
 
-IFC_PARSE_API void register_schema(schema_definition*);
+IFC_PARSE_API void register_schema(schema_definition* schema);
 
 IFC_PARSE_API void clear_schemas();
 } // namespace IfcParse