diff --git a/src/MAKE/Makefile.spirit b/src/MAKE/Makefile.spirit
index 82847fdc0d..725fe4a99c 100644
--- a/src/MAKE/Makefile.spirit
+++ b/src/MAKE/Makefile.spirit
@@ -6,7 +6,6 @@
 #   module load libraries/fftw-2.1.5_openmpi-1.2.2_mx_intel-9.1-f040-c045
 # fi;
 
-
 SHELL = /bin/sh
 .IGNORE:
 
diff --git a/src/fix_ttm.cpp b/src/fix_ttm.cpp
index ea66c6609b..3c5c181c77 100644
--- a/src/fix_ttm.cpp
+++ b/src/fix_ttm.cpp
@@ -50,9 +50,11 @@ FixTTM::FixTTM(LAMMPS *lmp, int narg, char **arg) :
   size_vector = 2;
   scalar_vector_freq = 1;
   extvector = 1;
-  nevery = 1;  
+  nevery = 1;
+  restart_peratom = 1;
+  restart_global = 1;
 
-  int seed = atoi(arg[3]);
+  seed = atoi(arg[3]);
   electronic_specific_heat = atof(arg[4]);
   electronic_density = atof(arg[5]);
   electronic_thermal_conductivity = atof(arg[6]);
@@ -144,7 +146,17 @@ FixTTM::FixTTM(LAMMPS *lmp, int narg, char **arg) :
  
   flangevin = NULL;
   grow_arrays(atom->nmax);
+
+  // zero out the flangevin array
+
+  for (int i = 0; i < atom->nmax; i++) {
+    flangevin[i][0] = 0;
+    flangevin[i][1] = 0;
+    flangevin[i][2] = 0;
+  }
+
   atom->add_callback(0);
+  atom->add_callback(1);
 
   // set initial electron temperatures from user input file
 
@@ -221,10 +233,10 @@ void FixTTM::init()
 void FixTTM::setup(int vflag)
 {
   if (strcmp(update->integrate_style,"verlet") == 0)
-    post_force(vflag);
+    post_force_setup(vflag);
   else {
     ((Respa *) update->integrate)->copy_flevel_f(nlevels_respa-1);
-    post_force_respa(vflag,nlevels_respa-1,0);
+    post_force_respa_setup(vflag,nlevels_respa-1,0);
     ((Respa *) update->integrate)->copy_f_flevel(nlevels_respa-1);
   }
 }
@@ -283,6 +295,25 @@ void FixTTM::post_force(int vflag)
 
 /* ---------------------------------------------------------------------- */
 
+void FixTTM::post_force_setup(int vflag)
+{
+  double **f = atom->f;
+  int *mask = atom->mask;
+  int nlocal = atom->nlocal;
+
+  // apply langevin forces that have been stored from previous run
+
+  for (int i = 0; i < nlocal; i++) {
+    if (mask[i] & groupbit) {
+      f[i][0] += flangevin[i][0];
+      f[i][1] += flangevin[i][1];
+      f[i][2] += flangevin[i][2];
+    }
+  }
+}
+
+/* ---------------------------------------------------------------------- */
+
 void FixTTM::post_force_respa(int vflag, int ilevel, int iloop)
 {
   if (ilevel == nlevels_respa-1) post_force(vflag);
@@ -290,6 +321,13 @@ void FixTTM::post_force_respa(int vflag, int ilevel, int iloop)
 
 /* ---------------------------------------------------------------------- */
 
+void FixTTM::post_force_respa_setup(int vflag, int ilevel, int iloop)
+{
+  if (ilevel == nlevels_respa-1) post_force_setup(vflag);
+}
+
+/* ---------------------------------------------------------------------- */
+
 void FixTTM::reset_dt()
 {
   for (int i = 1; i <= atom->ntypes; i++)
@@ -560,3 +598,98 @@ double FixTTM::compute_vector(int n)
   if (n == 1) return transfer_energy;
   return 0.0;
 }
+
+/* ----------------------------------------------------------------------
+   pack entire state of Fix into one write 
+------------------------------------------------------------------------- */
+
+void FixTTM::write_restart(FILE *fp)
+{
+ 
+  int n = 0;
+  double list[1 + nxnodes*nynodes*nznodes];  
+  
+  list[n++] = seed;
+ 
+  for (int ixnode = 0; ixnode < nxnodes; ixnode++)
+    for (int iynode = 0; iynode < nynodes; iynode++)
+      for (int iznode = 0; iznode < nznodes; iznode++)
+        list[n++] =  T_electron[ixnode][iynode][iznode];
+  
+  if (comm->me == 0) {
+    int size = n * sizeof(double);
+    fwrite(&size,sizeof(int),1,fp);
+    fwrite(&list,sizeof(double),n,fp);
+  }
+}
+
+/* ----------------------------------------------------------------------
+   use state info from restart file to restart the Fix 
+------------------------------------------------------------------------- */
+
+void FixTTM::restart(char *buf)
+{
+  int n = 0;
+  double *list = (double *) buf;
+  
+  // the seed must be changed from the initial seed
+  seed = static_cast<int> (2*list[n++]);  
+  
+  for (int ixnode = 0; ixnode < nxnodes; ixnode++)
+    for (int iynode = 0; iynode < nynodes; iynode++)
+      for (int iznode = 0; iznode < nznodes; iznode++)
+        T_electron[ixnode][iynode][iznode] = list[n++];  
+  
+  delete random;
+  random = new RanMars(lmp,seed+comm->me);
+}
+
+/* ----------------------------------------------------------------------
+   pack values in local atom-based arrays for restart file
+------------------------------------------------------------------------- */
+
+int FixTTM::pack_restart(int i, double *buf)
+{
+  buf[0] = 4;
+  buf[1] = flangevin[i][0];
+  buf[2] = flangevin[i][1];
+  buf[3] = flangevin[i][2];
+  return 4;
+}
+
+/* ----------------------------------------------------------------------
+   unpack values from atom->extra array to restart the fix
+------------------------------------------------------------------------- */
+
+void FixTTM::unpack_restart(int nlocal, int nth)
+{
+  double **extra = atom->extra;
+
+  // skip to Nth set of extra values
+
+  int m = 0;
+  for (int i = 0; i < nth; i++) m += static_cast<int> (extra[nlocal][m]);
+  m++;
+
+  flangevin[nlocal][0] = extra[nlocal][m++];
+  flangevin[nlocal][1] = extra[nlocal][m++];
+  flangevin[nlocal][2] = extra[nlocal][m++];
+}
+
+/* ----------------------------------------------------------------------
+   maxsize of any atom's restart data
+------------------------------------------------------------------------- */
+
+int FixTTM::maxsize_restart()
+{
+  return 4;
+}
+
+/* ----------------------------------------------------------------------
+   size of atom nlocal's restart data
+------------------------------------------------------------------------- */
+
+int FixTTM::size_restart(int nlocal)
+{
+  return 4;
+}
diff --git a/src/fix_ttm.h b/src/fix_ttm.h
index 64b6b7d3fa..eedd1cc855 100644
--- a/src/fix_ttm.h
+++ b/src/fix_ttm.h
@@ -27,8 +27,16 @@ class FixTTM : public Fix {
   void setup(int);
   void post_force(int);
   void post_force_respa(int, int, int);
+  void post_force_setup(int);
+  void post_force_respa_setup(int, int, int);
   void end_of_step();
   void reset_dt();
+  void write_restart(FILE *);
+  void restart(char *);
+  int pack_restart(int, double *);
+  void unpack_restart(int, int);
+  int size_restart(int);
+  int maxsize_restart();
   double memory_usage();
   void grow_arrays(int); 
   double compute_vector(int);
@@ -37,6 +45,7 @@ class FixTTM : public Fix {
   int me;
   int nfileevery;
   int nlevels_respa;
+  int seed;
   class RanMars *random;
   FILE *fp,*fpr;
   int nxnodes,nynodes,nznodes,total_nnodes;