diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 32283f404d1..f047f2c5dd8 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -5397,11 +5397,7 @@ plruby.use_strict = true        # generates error: unknown class name
       <listitem>
        <para>
         If on, emit information about user lock usage.  Output is the same
-        as for <symbol>trace_locks</symbol>, only for user locks.
-       </para>
-       <para>
-        User locks were removed as of PostgreSQL version 8.2.  This option
-        currently has no effect.
+        as for <symbol>trace_locks</symbol>, only for advisory locks.
        </para>
        <para>
         This parameter is only available if the <symbol>LOCK_DEBUG</symbol>