diff --git a/lib/reax/Makefile.gfortran b/lib/reax/Makefile.gfortran
index 7308bd89cc..471130f2f0 100755
--- a/lib/reax/Makefile.gfortran
+++ b/lib/reax/Makefile.gfortran
@@ -8,6 +8,13 @@
 # *      CONTACT: hansohl@mit.edu, athompson@sandia.gov, gjwagne@sandia.gov *
 # *_________________________________________________________________________*/
 
+# To compile and link LAMMPS to the reax library generated by this Makefile,
+# try appending the following definitions to the standard definitions in
+# whatever LAMMPS Makefile your are using.  
+# CCFLAGS =      -I../../lib/reax
+# LINKFLAGS =    -L../../lib/reax
+# USRLIB =       -lreax -lgfortran
+
 SHELL = /bin/sh
 
 # ------ FILES ------