diff --git a/var/spack/repos/builtin/packages/lammps/package.py b/var/spack/repos/builtin/packages/lammps/package.py
index 07c1452ea54..0f128c2c221 100644
--- a/var/spack/repos/builtin/packages/lammps/package.py
+++ b/var/spack/repos/builtin/packages/lammps/package.py
@@ -48,10 +48,10 @@ def url_for_version(self, version):
     supported_packages = ['asphere', 'body', 'class2', 'colloid', 'compress',
                           'coreshell', 'dipole', 'granular', 'kspace', 'latte',
                           'manybody', 'mc', 'meam', 'misc', 'molecule',
-                          'mpiio', 'peri', 'poems', 'python', 'qeq', 'reax',
+                          'mpiio', 'peri', 'poems', 'python', 'qeq',
                           'replica', 'rigid', 'shock', 'snap', 'spin', 'srd',
                           'user-atc', 'user-h5md', 'user-lb', 'user-misc',
-                          'user-netcdf', 'user-omp', 'voronoi']
+                          'user-netcdf', 'user-omp', 'user-reaxc', 'voronoi']
 
     for pkg in supported_packages:
         variant(pkg, default=False,