diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 04040ff258..72b5920aba 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1986,7 +1986,8 @@ include_dir 'conf.d'
        <listitem>
         <para>
          Sets the maximum number of background processes that the system
-         can support.  This parameter can only be set at server start.
+         can support.  This parameter can only be set at server start.  The
+         default is 8.
         </para>
 
         <para>