diff --git a/src/ifcopenshell-python/ifcopenshell/validate.py b/src/ifcopenshell-python/ifcopenshell/validate.py
index 01a0d61d36..7b90478583 100644
--- a/src/ifcopenshell-python/ifcopenshell/validate.py
+++ b/src/ifcopenshell-python/ifcopenshell/validate.py
@@ -53,6 +53,11 @@ from collections import namedtuple
 from typing import Union, Iterator, Any, Optional
 from logging import Logger, Handler
 
+if sys.version_info >= (3, 10):
+    from types import EllipsisType
+else:
+    EllipsisType = type(...)
+
 import ifcopenshell
 import ifcopenshell.simple_spf
 import ifcopenshell.ifcopenshell_wrapper
@@ -439,7 +444,7 @@ def validate(f: Union[ifcopenshell.file, str], logger: Logger, express_rules=Fal
         if hasattr(logger, "set_state"):
             logger.set_state("instance", inst)
 
-        guid: Union[str, None, types.EllipsisType]
+        guid: Union[str, None, EllipsisType]
         if (guid := getattr(inst, "GlobalId", ...)) is not ...:
             if guid is not None and guid in used_guids:
                 rule = "Rule IfcRoot.UR1:\n    The attribute GlobalId should be unique"