diff --git a/Lib/inspect.py b/Lib/inspect.py
index 56d05fb..c3338f2 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -38,6 +38,7 @@
 import sys
 import tokenize
 import types
+import warnings
 from operator import attrgetter
 from collections import namedtuple