diff --git a/altair/utils/schemapi.py b/altair/utils/schemapi.py
index 82611aae5..8f71247da 100644
--- a/altair/utils/schemapi.py
+++ b/altair/utils/schemapi.py
@@ -762,7 +762,7 @@ def func_1(
         ] = Undefined,
     ): ...
 
-This is distinct from `typing.Optional <https://typing.readthedocs.io/en/latest/spec/historical.html#union-and-optional>`__, as ``altair.Optional`` treats ``None`` like any other type::
+This is distinct from `typing.Optional <https://typing.readthedocs.io/en/latest/spec/historical.html#union-and-optional>`__ as ``altair.Optional`` treats ``None`` like any other type::
 
     # ruff: noqa: UP006, UP007
     from altair import Optional
diff --git a/tools/schemapi/schemapi.py b/tools/schemapi/schemapi.py
index e90dcfb60..b8bbe34c2 100644
--- a/tools/schemapi/schemapi.py
+++ b/tools/schemapi/schemapi.py
@@ -760,7 +760,7 @@ def func_1(
         ] = Undefined,
     ): ...
 
-This is distinct from `typing.Optional <https://typing.readthedocs.io/en/latest/spec/historical.html#union-and-optional>`__, as ``altair.Optional`` treats ``None`` like any other type::
+This is distinct from `typing.Optional <https://typing.readthedocs.io/en/latest/spec/historical.html#union-and-optional>`__ as ``altair.Optional`` treats ``None`` like any other type::
 
     # ruff: noqa: UP006, UP007
     from altair import Optional