diff --git a/usr.bin/xinstall/install.1 b/usr.bin/xinstall/install.1
index 6fc038e9476e..60d48c6c9364 100644
--- a/usr.bin/xinstall/install.1
+++ b/usr.bin/xinstall/install.1
@@ -351,7 +351,7 @@ utility appeared in
 The meaning of the
 .Fl M
 option has changed as of
-.Fx 10
+.Fx 9.2
 and it now takes an argument.
 Command lines that used the old
 .Fl M