diff --git a/Python.gitignore b/Python.gitignore
index 52d14980..b6e47617 100644
--- a/Python.gitignore
+++ b/Python.gitignore
@@ -91,7 +91,7 @@ ipython_config.py
 #   install all needed dependencies.
 #Pipfile.lock
 
-# pyflow
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
 __pypackages__/
 
 # Celery stuff