diff --git a/CHANGES.rst b/CHANGES.rst
index bb9c456c..55153c55 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,8 @@ Version 2.0.1
 Unreleased
 
 -   Mark top-level names as exported so type checking understands
-    imports in user projects. :issue:`215`
+    imports in user projects. :pr:`215`
+-   Fix some types that weren't available in Python 3.6.0. :pr:`215`
 
 
 Version 2.0.0
diff --git a/src/markupsafe/__init__.py b/src/markupsafe/__init__.py
index e9241ac3..7e2e7212 100644
--- a/src/markupsafe/__init__.py
+++ b/src/markupsafe/__init__.py
@@ -4,8 +4,9 @@
 import typing as t
 
 if t.TYPE_CHECKING:
+    import typing_extensions as te
 
-    class HasHTML(t.Protocol):
+    class HasHTML(te.Protocol):
         def __html__(self) -> str:
             pass