diff --git a/Grid_summation.h b/Grid_summation.h
new file mode 100644
index 00000000..dff2df61
--- /dev/null
+++ b/Grid_summation.h
@@ -0,0 +1,12 @@
+#ifndef GRID_SUMMATION_H
+#define GRID_SUMMATION_H
+
+template<class vobj>
+inline void sumBlocks(Lattice<vobj> &coarseData,const Lattice<vobj &fineData)
+{
+  GridBase * fine  = findData._grid;
+  GridBase * coarse= findData._grid;
+  
+  return;
+}
+#endif