diff --git a/stdlib/3/re.pyi b/stdlib/3/re.pyi
index 942f9bf6b..a303583cb 100644
--- a/stdlib/3/re.pyi
+++ b/stdlib/3/re.pyi
@@ -71,6 +71,10 @@ else:
     TEMPLATE = 0
     _FlagsType = int
 
+if sys.version_info < (3, 7):
+    # undocumented
+    _pattern_type = ...  # type: type
+
 class error(Exception): ...
 
 @overload