diff --git a/doc/src/sgml/ref/postgres-ref.sgml b/doc/src/sgml/ref/postgres-ref.sgml
index 2187063d69..fd79274669 100644
--- a/doc/src/sgml/ref/postgres-ref.sgml
+++ b/doc/src/sgml/ref/postgres-ref.sgml
@@ -1,5 +1,5 @@
@@ -262,7 +262,7 @@ postgres [ -B nBuffers ] [ -C ] [ -
- -A n|r|b|Q|X
+ -A [ n | r | b | Q | X ]
This option generates a tremendous amount of output.