diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index fc6e48427ed..c2cdde77f31 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -836,7 +836,8 @@ psql: could not connect to server: No such file or directory
     When using System V semaphores,
     <productname>PostgreSQL</productname> uses one semaphore per allowed connection
     (<xref linkend="guc-max-connections"/>), allowed autovacuum worker process
-    (<xref linkend="guc-autovacuum-max-workers"/>) and allowed background
+    (<xref linkend="guc-autovacuum-max-workers"/>), allowed WAL sender process
+    (<xref linkend="guc-max-wal-senders"/>), and allowed background
     process (<xref linkend="guc-max-worker-processes"/>), in sets of 16.
     Each such set will
     also contain a 17th semaphore which contains a <quote>magic