diff --git a/doc/reference.rst b/doc/reference.rst
index 031c457c3..48f90b2f9 100644
--- a/doc/reference.rst
+++ b/doc/reference.rst
@@ -3109,6 +3109,10 @@ This option triggers the automatic generation of reverse PTR records based on
 A/AAAA records in the specified zones. The entire generated zone is automatically
 stored in the journal.
 
+The auto-generated reverse zone is re-generated whenever any of the specified zones
+is updated. This includes the situation when reverse generation had failed due to
+some of the specified zones were not yet loaded or had expired.
+
 Current limitations:
 
 - Is slow for large zones (even when changing a little).