diff --git a/docs/releasenotes.rst b/docs/releasenotes.rst
index 96265c7d1a6f19098b7b2fde7de2eab5de471358..d15411ae55ed2e89413a793ef9aa6c7196c4311a 100644
--- a/docs/releasenotes.rst
+++ b/docs/releasenotes.rst
@@ -35,6 +35,8 @@ Breaking changes:
 
 * ``ldap_server`` role
 
+  * Parameter ``ldap_server_domain`` is now mandatory.
+
   * Updated default set of TLS ciphers used by server
     (``ldap_tls_ciphers`` parameter). All CBC ciphers have been
     dropped. This could introduce incompatibility with older clients