diff --git a/CHANGES.rst b/CHANGES.rst
index 4fec7c54..13790a3a 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,5 +1,13 @@
 .. currentmodule:: flask
 
+Version 2.0.3
+-------------
+
+Unreleased
+
+- Fix type issue with `app.errorhandler` decorator. :issue `4295`
+
+
 Version 2.0.2
 -------------
 
diff --git a/src/flask/typing.py b/src/flask/typing.py
index f1c84670..93896f80 100644
--- a/src/flask/typing.py
+++ b/src/flask/typing.py
@@ -46,11 +46,4 @@ TemplateGlobalCallable = t.Callable[..., t.Any]
 TemplateTestCallable = t.Callable[..., bool]
 URLDefaultCallable = t.Callable[[str, dict], None]
 URLValuePreprocessorCallable = t.Callable[[t.Optional[str], t.Optional[dict]], None]
-
-
-if t.TYPE_CHECKING:
-    import typing_extensions as te
-
-    class ErrorHandlerCallable(te.Protocol[GenericException]):
-        def __call__(self, error: GenericException) -> ResponseReturnValue:
-            ...
+ErrorHandlerCallable = t.Callable[[GenericException], ResponseReturnValue]