diff --git a/doc/src/sgml/ref/postgres-ref.sgml b/doc/src/sgml/ref/postgres-ref.sgml
index d332cbae1d8..bd4ae338f73 100644
--- a/doc/src/sgml/ref/postgres-ref.sgml
+++ b/doc/src/sgml/ref/postgres-ref.sgml
@@ -745,7 +745,10 @@ PostgreSQL documentation
 
    <para>
     Note that the single-user mode server does not provide sophisticated
-    line-editing features (no command history, for example).
+    line-editing features (no command history, for example). 
+    Single-User mode also does not do any background processing, like
+    automatic checkpoints.
+
    </para>
  </refsect1>