From 0f33c000fb813096017f3dcf9284bdbcab818c6a Mon Sep 17 00:00:00 2001
From: sebphi <34366521+sebphi@users.noreply.github.com>
Date: Fri, 5 Apr 2024 17:38:10 +0200
Subject: [PATCH] Fix import of ifcopenshell.util.unit in Python <3.10 #4520

---
 src/ifcopenshell-python/ifcopenshell/util/unit.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ifcopenshell-python/ifcopenshell/util/unit.py b/src/ifcopenshell-python/ifcopenshell/util/unit.py
index ee1b77d619..eb4dda775e 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/unit.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/unit.py
@@ -668,7 +668,7 @@ def format_length(
 
 
 def is_attr_type(
-    content_type: ifcopenshell.ifcopenshell_wrapper.named_type | ifcopenshell.ifcopenshell_wrapper.type_declaration,
+    content_type: Union[ifcopenshell.ifcopenshell_wrapper.named_type, ifcopenshell.ifcopenshell_wrapper.type_declaration],
     ifc_unit_type_name: str,
 ) -> Union[ifcopenshell.ifcopenshell_wrapper.type_declaration, None]:
     cur_decl = content_type