diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 4f8c4ab9c..3683adcd8 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -56,6 +56,7 @@ class DecompressionBombError(Exception):
 class _imaging_not_installed(object):
     # module placeholder
     def __getattr__(self, id):
+        # type: (str) -> Any
         raise ImportError("The _imaging C module is not installed")