diff --git a/lib/Cshift.h b/lib/Cshift.h
index bbc56cae..4eeb6cea 100644
--- a/lib/Cshift.h
+++ b/lib/Cshift.h
@@ -38,6 +38,10 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #include <Grid/cshift/Cshift_mpi.h>
 #endif 
 
+#ifdef GRID_COMMS_MPI3
+#include <Grid/cshift/Cshift_mpi.h>
+#endif 
+
 #ifdef GRID_COMMS_SHMEM
 #include <Grid/cshift/Cshift_mpi.h> // uses same implementation of communicator
 #endif