diff --git a/src/bonsai/bonsai/bim/helper.py b/src/bonsai/bonsai/bim/helper.py
index 4acc31b160..c1277bedf8 100644
--- a/src/bonsai/bonsai/bim/helper.py
+++ b/src/bonsai/bonsai/bim/helper.py
@@ -187,7 +187,7 @@ def import_attributes(
         info = {a.name(): None for a in attributes}
         info["type"] = element
     else:
-        assert (entity := element.declaration().as_entity())
+        assert (entity := element.declaration.as_entity())
         attributes = entity.all_attributes()
         info = element.get_info()
     for attribute in attributes:
diff --git a/src/bonsai/bonsai/bim/module/cost/data.py b/src/bonsai/bonsai/bim/module/cost/data.py
index 3c96c8828a..14967d032d 100644
--- a/src/bonsai/bonsai/bim/module/cost/data.py
+++ b/src/bonsai/bonsai/bim/module/cost/data.py
@@ -206,7 +206,7 @@ class CostSchedulesData:
                 data["UnitSymbol"] = ifcopenshell.util.unit.get_unit_symbol(unit)
             if quantity.is_a("IfcPhysicalSimpleQuantity"):
                 measure_class = (
-                    quantity.declaration()
+                    quantity.declaration
                     .as_entity()
                     .attribute_by_index(3)
                     .type_of_attribute()
diff --git a/src/bonsai/bonsai/bim/module/search/data.py b/src/bonsai/bonsai/bim/module/search/data.py
index e4fc6f854a..0a0fd51219 100644
--- a/src/bonsai/bonsai/bim/module/search/data.py
+++ b/src/bonsai/bonsai/bim/module/search/data.py
@@ -95,7 +95,7 @@ class ColourByPropertyData:
         element = tool.Ifc.get_entity(obj)
         if not element:
             return default
-        keys = [a.name() for a in element.declaration().as_entity().all_attributes()]
+        keys = [a.name() for a in element.declaration.as_entity().all_attributes()]
         psets = ifcopenshell.util.element.get_psets(element)
         for pset, properties in psets.items():
             if pset.endswith("Common"):
@@ -126,7 +126,7 @@ class SelectSimilarData:
         element = tool.Ifc.get_entity(obj)
         if not element:
             return []
-        keys = [a.name() for a in element.declaration().as_entity().all_attributes()]
+        keys = [a.name() for a in element.declaration.as_entity().all_attributes()]
         psets = ifcopenshell.util.element.get_psets(element, psets_only=True)
         for pset, properties in psets.items():
             if pset.endswith("Common"):
diff --git a/src/bonsai/bonsai/tool/geometry.py b/src/bonsai/bonsai/tool/geometry.py
index 5e07de2969..c647682679 100644
--- a/src/bonsai/bonsai/tool/geometry.py
+++ b/src/bonsai/bonsai/tool/geometry.py
@@ -2166,7 +2166,7 @@ class Geometry(bonsai.core.tool.Geometry):
         item = tool.Ifc.get().by_id(props.ifc_definition_id)
         allowed_attributes = [
             a.name()
-            for a in item.declaration().as_entity().all_attributes()
+            for a in item.declaration().as_entity.all_attributes()
             if a.type_of_attribute()._is("IfcLengthMeasure")
         ]
 
diff --git a/src/ifc5d/ifc5d/ifc2json.py b/src/ifc5d/ifc5d/ifc2json.py
index 344d36f095..a3938f8d60 100644
--- a/src/ifc5d/ifc5d/ifc2json.py
+++ b/src/ifc5d/ifc5d/ifc2json.py
@@ -168,7 +168,7 @@ class ifc5D2json:
                 data["UnitSymbol"] = ifcopenshell.util.unit.get_unit_symbol(unit)
             if quantity.is_a("IfcPhysicalSimpleQuantity"):
                 measure_class = (
-                    quantity.declaration()
+                    quantity.declaration
                     .as_entity()
                     .attribute_by_index(3)
                     .type_of_attribute()
diff --git a/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi b/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi
index d7603c3c00..bf27a91f29 100644
--- a/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi
+++ b/src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi
@@ -765,6 +765,7 @@ class entity_instance(entity_instance_mixin):
     file_: Any
     id_: Any
     def data(self, *args): ...
+    @property
     def declaration(self) -> declaration: ...
     def file_pointer(self):
         """Internal IfcFile pointer address.
diff --git a/src/ifctester/ifctester/facet.py b/src/ifctester/ifctester/facet.py
index cc50de57f4..5c05ae3cc4 100644
--- a/src/ifctester/ifctester/facet.py
+++ b/src/ifctester/ifctester/facet.py
@@ -749,7 +749,7 @@ class Property(Facet):
                                 ifcopenshell.util.unit.si_type_names[unit.UnitType],
                             )
                     elif prop_entity.is_a("IfcPhysicalSimpleQuantity"):
-                        prop_schema = prop_entity.declaration().as_entity()
+                        prop_schema = prop_entity.declaration.as_entity()
                         data_type = prop_schema.attribute_by_index(3).type_of_attribute().declared_type().name()
 
                         if self.dataType and data_type.lower() != self.dataType.lower():
diff --git a/src/wrappergen/examples/print_walls.py b/src/wrappergen/examples/print_walls.py
index 6d4c14f416..7ead197195 100644
--- a/src/wrappergen/examples/print_walls.py
+++ b/src/wrappergen/examples/print_walls.py
@@ -17,7 +17,7 @@ def main() -> int:
 
     model = ifx.file.with_path(sys.argv[1])
     for wall in model.instances_by_type("IfcWall"):
-        print(f"#{wall.id()} {wall.declaration().name()}")
+        print(f"#{wall.id()} {wall.declaration.name()}")
     return 0