diff --git a/examples/COUPLE/fortran2/LAMMPS.F90 b/examples/COUPLE/fortran2/LAMMPS.F90
index 86e5a4ba2d..2f4ae2c95e 100644
--- a/examples/COUPLE/fortran2/LAMMPS.F90
+++ b/examples/COUPLE/fortran2/LAMMPS.F90
@@ -1,7 +1,7 @@
 !! -----------------------------------------------------------------------
 !   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
-!   www.cs.sandia.gov/~sjplimp/lammps.html
-!   Steve Plimpton, sjplimp@sandia.gov, Sandia National Laboratories
+!   https://www.lammps.org/ Sandia National Laboratories
+!   LAMMPS Development team: developers@lammps.org
 !
 !   Copyright (2003) Sandia Corporation.  Under the terms of Contract
 !   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
@@ -17,6 +17,15 @@
 !   Updated October 2020 by the author (now at the University of Missouri).
 !--------------------------------------------------------------------------
 
+!! NOTE -------------------------------------------------------------------
+!  This interface is obsolete and may be removed in a future release of
+!  LAMMPS. The interface in fortran/lammps.f90 replaces this one. That API
+!  is maintained by the LAMMPS developers and has documentation written for
+!  it; it is based loosely on this one, but binds all procedures to a lammps
+!  derived type. That interface was written in large
+!  part by the same author, but is also supported by other developers.
+!--------------------------------------------------------------------------
+
 !! LAMMPS, a Fortran 2003 module containing an interface between Fortran
 !! programs and the C-style functions in library.cpp that ship with LAMMPS.
 !! This file should be accompanied by LAMMPS-wrapper.cpp and LAMMPS-wrapper.h,
diff --git a/examples/COUPLE/fortran2/README b/examples/COUPLE/fortran2/README
index 3f88d60750..b36cb43746 100644
--- a/examples/COUPLE/fortran2/README
+++ b/examples/COUPLE/fortran2/README
@@ -1,3 +1,12 @@
+!! NOTE -------------------------------------------------------------------
+!  This interface is obsolete and may be removed in a future release of
+!  LAMMPS. The interface in fortran/lammps.f90 replaces this one. That API
+!  is maintained by the LAMMPS developers and has documentation written for
+!  it; it is based loosely on this one, but binds all procedures to a lammps
+!  derived type. That interface was written in large
+!  part by the same author, but is also supported by other developers.
+!--------------------------------------------------------------------------
+
 LAMMPS.F90 defines a Fortran 2003 module, LAMMPS, which wraps all functions in
 src/library.h so they can be used directly from Fortran-encoded programs.