diff --git a/stdlib/2/typing.pyi b/stdlib/2/typing.pyi
index 84cd0d455..d8c49a421 100644
--- a/stdlib/2/typing.pyi
+++ b/stdlib/2/typing.pyi
@@ -24,6 +24,11 @@ ClassVar: _SpecialForm = ...
 
 class GenericMeta(type): ...
 
+# Return type that indicates a function does not return.
+# This type is equivalent to the None type, but the no-op Union is necessary to
+# distinguish the None type from the None value.
+NoReturn = Union[None]
+
 # Type aliases and type constructors
 
 class TypeAlias:
diff --git a/stdlib/3/typing.pyi b/stdlib/3/typing.pyi
index e8d5b5bb2..71f97ce4c 100644
--- a/stdlib/3/typing.pyi
+++ b/stdlib/3/typing.pyi
@@ -25,6 +25,11 @@ ClassVar: _SpecialForm = ...
 
 class GenericMeta(type): ...
 
+# Return type that indicates a function does not return.
+# This type is equivalent to the None type, but the no-op Union is necessary to
+# distinguish the None type from the None value.
+NoReturn = Union[None]
+
 # Type aliases and type constructors
 
 class TypeAlias: