diff --git a/docs/Glossary.md b/docs/Glossary.md
index c51d7fe..3d95ae7 100644
--- a/docs/Glossary.md
+++ b/docs/Glossary.md
@@ -217,7 +217,7 @@ The key is used for identification in Yaml rule files.
 
 #### Watchlisted by (username)
 
-> List of users that have the Plex item in their watchlist. This rule is experimental and might not work for all use cases.
+> List of users that have the Plex item in their watchlist. This does not work with private watchlists. This rule is experimental and might not work for all use cases.
 
 - Key: Plex.watchlist_isListedByUsers
 - Availability: movies, shows, seasons, episodes