diff --git a/docs/config.rst b/docs/config.rst
index fd982fb4..5aafe6ff 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -441,6 +441,7 @@ Local
         [pair my_calendar]
         a = my_calendar_local
         b = my_calendar_remote
+        collections = null
 
         [storage my_calendar_local]
         type = "singlefile"