diff --git a/src/compute_sum.h b/src/compute_sum.h
new file mode 100644
index 0000000000..f766ec09d7
--- /dev/null
+++ b/src/compute_sum.h
@@ -0,0 +1,35 @@
+/* ----------------------------------------------------------------------
+   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+   http://lammps.sandia.gov, Sandia National Laboratories
+   Steve Plimpton, sjplimp@sandia.gov
+
+   Copyright (2003) Sandia Corporation.  Under the terms of Contract
+   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
+   certain rights in this software.  This software is distributed under 
+   the GNU General Public License.
+
+   See the README file in the top-level LAMMPS directory.
+------------------------------------------------------------------------- */
+
+#ifndef COMPUTE_SUM_H
+#define COMPUTE_SUM_H
+
+#include "compute.h"
+
+namespace LAMMPS_NS {
+
+class ComputeSum : public Compute {
+ public:
+  ComputeSum(class LAMMPS *, int, char **);
+  ~ComputeSum();
+  void init();
+  double compute_scalar();
+  void compute_vector();
+
+ private:
+  class Compute **compute;
+};
+
+}
+
+#endif