diff --git a/src/MC/fix_gcmc.cpp b/src/MC/fix_gcmc.cpp
index e8087f1344..b8eecf95ca 100644
--- a/src/MC/fix_gcmc.cpp
+++ b/src/MC/fix_gcmc.cpp
@@ -2330,7 +2330,9 @@ double FixGCMC::energy_full()
   // unlike Verlet, not performing a reverse_comm() or forces here
   // b/c GCMC does not care about forces
   // don't think it will mess up energy due to any post_force() fixes
+  // but Modify::pre_reverse() is needed for USER-INTEL
 
+  if (modify->n_pre_reverse) modify->pre_reverse(eflag,vflag);
   if (modify->n_post_force) modify->post_force(vflag);
   if (modify->n_end_of_step) modify->end_of_step();
 
diff --git a/src/MC/fix_widom.cpp b/src/MC/fix_widom.cpp
index 4a06dbafbd..a1bdc32515 100644
--- a/src/MC/fix_widom.cpp
+++ b/src/MC/fix_widom.cpp
@@ -1057,7 +1057,9 @@ double FixWidom::energy_full()
   // unlike Verlet, not performing a reverse_comm() or forces here
   // b/c Widom does not care about forces
   // don't think it will mess up energy due to any post_force() fixes
+  // but Modify::pre_reverse() is needed for USER-INTEL
 
+  if (modify->n_pre_reverse) modify->pre_reverse(eflag,vflag);
   if (modify->n_pre_force) modify->pre_force(vflag);
   if (modify->n_end_of_step) modify->end_of_step();