diff --git a/doc/nano.1 b/doc/nano.1
index cc2eab80..5e0b66be 100644
--- a/doc/nano.1
+++ b/doc/nano.1
@@ -347,6 +347,9 @@ Don't show the two help lines at the bottom of the screen.
 .BR \-y ", " \-\-afterends
 Make Ctrl+Right and Ctrl+Delete stop at word ends instead of beginnings.
 .TP
+.BR \-z ", " \-\-listsyntaxes
+List the names of the available syntaxes and exit.
+.TP
 .BR \-! ", " \-\-magic
 When neither the file's name nor its first line give a clue,
 try using libmagic to determine the applicable syntax.
diff --git a/doc/nano.texi b/doc/nano.texi
index dbdc2ff8..25ecb0ac 100644
--- a/doc/nano.texi
+++ b/doc/nano.texi
@@ -712,6 +712,10 @@ disabled to display the help-system navigation keys.
 Make @kbd{Ctrl+Right} and @kbd{Ctrl+Delete} stop at word ends
 instead of beginnings.
 
+@item -z
+@itemx --listsyntaxes
+List the names of the available syntaxes and exit.
+
 @item -!
 @itemx --magic
 When neither the file's name nor its first line give a clue,