diff --git a/doc/src/sgml/storage.sgml b/doc/src/sgml/storage.sgml
index 1f3f1f9bf97..c587b690474 100644
--- a/doc/src/sgml/storage.sgml
+++ b/doc/src/sgml/storage.sgml
@@ -89,6 +89,11 @@ Item
  <entry>Subdirectory containing LISTEN/NOTIFY status data</entry>
 </row>
 
+<row>
+ <entry><filename>pg_replslot</></entry>
+ <entry>Subdirectory containing replication slot data</entry>
+</row>
+
 <row>
  <entry><filename>pg_serial</></entry>
  <entry>Subdirectory containing information about committed serializable transactions</entry>