diff --git a/bin/nsupdate/nsupdate.rst b/bin/nsupdate/nsupdate.rst
index 3d9425a5cb..17ab96d421 100644
--- a/bin/nsupdate/nsupdate.rst
+++ b/bin/nsupdate/nsupdate.rst
@@ -256,7 +256,7 @@ The command formats and their meanings are as follows:
    in ``krb5.conf``. If no realm is specified, the saved realm is
    cleared.
 
-``check-names [yes_or_no]``
+``check-names [boolean]``
    This command turns on or off check-names processing on records to be added.
    Check-names has no effect on prerequisites or records to be deleted.
    By default check-names processing is on. If check-names processing
diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index eb17d9b32a..24d8eb134b 100644
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -345,7 +345,7 @@ file documentation:
     ``percentage``
          An integer value followed by ``%`` to represent percent.
 
-    ``yes_or_no``
+    ``boolean``
         Either ``yes`` or ``no``. The words ``true`` and ``false`` are also accepted, as are the numbers ``1`` and ``0``.
 
 .. _configuration_file_grammar:
@@ -6054,7 +6054,7 @@ The :any:`trusted-keys` statement has been deprecated in favor of
    view view_name [ class ] {
        match-clients { address_match_list } ;
        match-destinations { address_match_list } ;
-       match-recursive-only yes_or_no ;
+       match-recursive-only <boolean> ;
      [ view_option ; ... ]
      [ zone_statement ; ... ]
    } ;
diff --git a/doc/man/nsupdate.1in b/doc/man/nsupdate.1in
index 4f4b4f8025..d83bd49ccd 100644
--- a/doc/man/nsupdate.1in
+++ b/doc/man/nsupdate.1in
@@ -284,7 +284,7 @@ When using GSS\-TSIG, this command specifies the use of \fBrealm_name\fP rather
 in \fBkrb5.conf\fP\&. If no realm is specified, the saved realm is
 cleared.
 .TP
-.B \fBcheck\-names [yes_or_no]\fP
+.B \fBcheck\-names [boolean]\fP
 This command turns on or off check\-names processing on records to be added.
 Check\-names has no effect on prerequisites or records to be deleted.
 By default check\-names processing is on. If check\-names processing