diff --git a/stdlib/3/urllib/error.pyi b/stdlib/3/urllib/error.pyi
index e9730002a..279296400 100644
--- a/stdlib/3/urllib/error.pyi
+++ b/stdlib/3/urllib/error.pyi
@@ -1,6 +1,5 @@
 # Stubs for urllib.error
 
-# NOTE: These are incomplete!
-
 class URLError(IOError): ...
 class HTTPError(URLError): ...
+class ContentTooShortError(URLError): ...