diff --git a/Grid/communicator/Communicator_mpi3.cc b/Grid/communicator/Communicator_mpi3.cc
index c9990045..71dd6ffe 100644
--- a/Grid/communicator/Communicator_mpi3.cc
+++ b/Grid/communicator/Communicator_mpi3.cc
@@ -48,17 +48,18 @@ void CartesianCommunicator::Init(int *argc, char ***argv)
 #if defined (A64FX) || defined (A64FXFIXEDSIZE)
 #ifndef TOFU
 #define TOFU
-#pragma message ("TOFU network / MPI_THREAD_SINGLE")
+#pragma message ("TOFU network / MPI_THREAD_SERIALIZED")
 #endif
 #endif
 
 #if defined (TOFU) // FUGAKU, credits go to Issaku Kanamori
     nCommThreads=1;
-    MPI_Init(argc,argv);
+    // wrong results here too
+    //MPI_Init(argc,argv);
 
     // comms-overlap leads to wrong results in Benchmark_wilson even on single node MPI runs
     // other comms schemes are ok
-    //MPI_Init_thread(argc,argv,MPI_THREAD_SERIALIZED,&provided);
+    MPI_Init_thread(argc,argv,MPI_THREAD_SERIALIZED,&provided);
 #else
     MPI_Init_thread(argc,argv,MPI_THREAD_MULTIPLE,&provided);
 #endif