diff --git a/import-and-importlib-notes.md b/import-and-importlib-notes.md
index dcf3c26..02b8d88 100644
--- a/import-and-importlib-notes.md
+++ b/import-and-importlib-notes.md
@@ -116,3 +116,6 @@ Sources
 * https://peps.python.org/pep-0273/ Import from Zip Archives
 * https://peps.python.org/pep-0302/ Import hooks (sys.meta_path, sys.path_hooks)
 * https://peps.python.org/pep-0451/ ModuleSpec for import hooks
+
+Issues
+* https://github.com/mitogen-hq/mitogen/issues/1111
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