diff --git a/Grid/serialisation/Hdf5IO.h b/Grid/serialisation/Hdf5IO.h
index ec26612a..4b783a73 100644
--- a/Grid/serialisation/Hdf5IO.h
+++ b/Grid/serialisation/Hdf5IO.h
@@ -123,9 +123,11 @@ namespace Grid
     
     if (flatx.size() > dataSetThres_)
     {
-      H5NS::DataSet dataSet;
+      H5NS::DataSet           dataSet;
+      H5NS::DSetCreatPropList plist;
       
-      dataSet = group_.createDataSet(s, Hdf5Type<Element>::type(), dataSpace);
+      plist.setFletcher32();
+      dataSet = group_.createDataSet(s, Hdf5Type<Element>::type(), dataSpace, plist);
       dataSet.write(flatx.data(), Hdf5Type<Element>::type());
     }
     else
diff --git a/Hadrons/A2AMatrix.hpp b/Hadrons/A2AMatrix.hpp
index e224a95e..ed2f5d36 100644
--- a/Hadrons/A2AMatrix.hpp
+++ b/Hadrons/A2AMatrix.hpp
@@ -442,6 +442,7 @@ void A2AMatrixIo<T>::initFile(const MetadataType &d, const unsigned int chunkSiz
     push(reader, dataname_);
     auto &group = reader.getGroup();
     plist.setChunk(chunk.size(), chunk.data());
+    plist.setFletcher32();
     dataset = group.createDataSet(HADRONS_A2AM_NAME, Hdf5Type<T>::type(), dataspace, plist);
 #else
     HADRONS_ERROR(Implementation, "all-to-all matrix I/O needs HDF5 library");
@@ -502,14 +503,12 @@ void A2AMatrixIo<T>::load(Vec<VecT> &v, double *tRead)
     H5NS::DataSet        dataset;
     H5NS::DataSpace      dataspace;
     H5NS::CompType       datatype;
-    H5NS::DSetCreatPropList plist;
     
     push(reader, dataname_);
     auto &group = reader.getGroup();
     dataset     = group.openDataSet(HADRONS_A2AM_NAME);
     datatype    = dataset.getCompType();
     dataspace   = dataset.getSpace();
-    plist       = dataset.getCreatePlist();
     hdim.resize(dataspace.getSimpleExtentNdims());
     dataspace.getSimpleExtentDims(hdim.data());
     if ((nt_*ni_*nj_ != 0) and