diff --git a/contrib/mandoc/mdoc.7 b/contrib/mandoc/mdoc.7
--- a/contrib/mandoc/mdoc.7
+++ b/contrib/mandoc/mdoc.7
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: August 19 2025 $
+.Dd $Mdocdate: June 19, 2026 $
 .Dt MDOC 7
 .Os
 .Sh NAME
@@ -417,6 +417,14 @@
 .Ic \&Xr .
 .It Em STANDARDS
 References any standards implemented or used.
+Extensions to implemented standards should be declared in this section
+as follows: 
+.Bd -literal -offset indent
+The
+\&.Fl v
+option is a non-standard extension.
+.Ed
+.Pp
 If not adhering to any standards, the
 .Em HISTORY
 section should be used instead.