diff --git a/setup.cfg b/setup.cfg
index 488d782f..c52c0cdb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -52,6 +52,7 @@ ignore_missing_imports = True
 files =
     kombu/abstract.py,
     kombu/utils/debug.py,
+    kombu/utils/encoding.py,
     kombu/utils/time.py,
     kombu/utils/uuid.py,
     t/unit/utils/test_uuid.py,