diff --git a/doc/man/man1/ldapsearch.1 b/doc/man/man1/ldapsearch.1
index 19170003d0..6d203d6418 100644
--- a/doc/man/man1/ldapsearch.1
+++ b/doc/man/man1/ldapsearch.1
@@ -274,6 +274,7 @@ Search extensions:
   [!]domainScope                               (domain scope)
   [!]mv=<filter>                               (matched values filter)
   [!]pr=<size>[/prompt|noprompt]       (paged results/prompt)
+  [!]sss=[-]<attr[:OID]>[/[-]<attr[:OID]>...]  (server side sorting)
   [!]subentries[=true|false]           (subentries)
   [!]sync=ro[/<cookie>]                        (LDAP Sync refreshOnly)
           rp[/<cookie>][/<slimit>]     (LDAP Sync refreshAndPersist)