diff --git a/doc/src/sgml/bgworker.sgml b/doc/src/sgml/bgworker.sgml
index 4bc2b696b3f..e490bb8750e 100644
--- a/doc/src/sgml/bgworker.sgml
+++ b/doc/src/sgml/bgworker.sgml
@@ -41,7 +41,7 @@
   *worker, BackgroundWorkerHandle **handle</type>)</function>.  Unlike
   <function>RegisterBackgroundWorker</function>, which can only be called from within
   the postmaster, <function>RegisterDynamicBackgroundWorker</function> must be
-  called from a regular backend.
+  called from a regular backend, possibly another background worker.
  </para>
 
  <para>