diff --git a/usr.bin/ctags/ctags.1 b/usr.bin/ctags/ctags.1
index ca04bfe6bcb0..2be5733d6c4f 100644
--- a/usr.bin/ctags/ctags.1
+++ b/usr.bin/ctags/ctags.1
@@ -210,6 +210,11 @@ by default.
 .Sh SEE ALSO
 .Xr ex 1 ,
 .Xr vi 1
+.Sh STANDARDS
+The
+.Nm
+utility conforms to
+.St -p1003.1-2001 .
 .Sh HISTORY
 The
 .Nm