diff --git a/stdlib/2.7/urllib.pyi b/stdlib/2.7/urllib.pyi
index 91d7be6e5..080f88a5f 100644
--- a/stdlib/2.7/urllib.pyi
+++ b/stdlib/2.7/urllib.pyi
@@ -129,6 +129,7 @@ def quote_plus(s: str, safe=...) -> str: ...
 def urlencode(query: Union[Sequence[Tuple[Any, Any]], Mapping[Any, Any]], doseq=...) -> str: ...
 
 def getproxies() -> Mapping[str, str]: ... # type: Any
+def proxy_bypass(host): ...
 
 # Names in __all__ with no definition:
 #   basejoin
diff --git a/stdlib/3/urllib/request.pyi b/stdlib/3/urllib/request.pyi
index fffc13fa5..3aeb20f46 100644
--- a/stdlib/3/urllib/request.pyi
+++ b/stdlib/3/urllib/request.pyi
@@ -11,3 +11,5 @@ class OpenerDirector(): ...
 # TODO args should be types that extend BaseHandler (types, not instances)
 def build_opener(*args: Any) -> OpenerDirector: ...
 def install_opener(opener: OpenerDirector) -> None: ...
+
+def proxy_bypass(host): ...
diff --git a/third_party/2.7/six/moves/urllib/request.pyi b/third_party/2.7/six/moves/urllib/request.pyi
index 8c8a8b7df..109cda88f 100644
--- a/third_party/2.7/six/moves/urllib/request.pyi
+++ b/third_party/2.7/six/moves/urllib/request.pyi
@@ -35,5 +35,4 @@ from urllib import urlretrieve as urlretrieve
 from urllib import urlcleanup as urlcleanup
 from urllib import URLopener as URLopener
 from urllib import FancyURLopener as FancyURLopener
-# Don't have type stubs for proxy_bypass in stdlib urllib
-# from urllib import proxy_bypass as proxy_bypass
+from urllib import proxy_bypass as proxy_bypass
diff --git a/third_party/3/six/moves/urllib/request.pyi b/third_party/3/six/moves/urllib/request.pyi
index b15ced7ea..1a7537862 100644
--- a/third_party/3/six/moves/urllib/request.pyi
+++ b/third_party/3/six/moves/urllib/request.pyi
@@ -37,4 +37,4 @@ from urllib.request import build_opener as build_opener
 # from urllib.request import urlcleanup as urlcleanup
 # from urllib.request import URLopener as URLopener
 # from urllib.request import FancyURLopener as FancyURLopener
-# from urllib.request import proxy_bypass as proxy_bypass
+from urllib.request import proxy_bypass as proxy_bypass