diff --git a/src/USER-REAXC/pair_reax_c.cpp b/src/USER-REAXC/pair_reax_c.cpp
index 5f49d3b02bc2c812f0033302d87113b3b5d2a5dc..c79c58fe986e2825cdb25c28b1f0f86cd42f2966 100644
--- a/src/USER-REAXC/pair_reax_c.cpp
+++ b/src/USER-REAXC/pair_reax_c.cpp
@@ -449,15 +449,6 @@ void PairReaxC::setup( )
 
     ReAllocate( system, control, data, workspace, &lists, mpi_data );
   }
-
-  ngroup = 0;
-  int ngroup_sum = 0;
-  for (int i = 0; i < list->inum; i++) {
-    ngroup ++;
-  }
-  MPI_Allreduce( &ngroup, &ngroup_sum, 1, MPI_INT, MPI_SUM, world );
-  ngroup = ngroup_sum;
-
 }
 
 /* ---------------------------------------------------------------------- */
diff --git a/src/USER-REAXC/pair_reax_c.h b/src/USER-REAXC/pair_reax_c.h
index 3ddeb781a67f79dbeb11735ada0707da168b6f11..1f7a5c9f00a8ece971cf8564e3ba6c1e222fefa8 100644
--- a/src/USER-REAXC/pair_reax_c.h
+++ b/src/USER-REAXC/pair_reax_c.h
@@ -57,8 +57,6 @@ class PairReaxC : public Pair {
   reax_list *lists;
   mpi_datatypes *mpi_data;
 
-  bigint ngroup;
-
  private:
   double cutmax;
   int nelements;                // # of unique elements