diff --git a/README-mpi-hints.md b/README-mpi-hints.md
index 94c3948c3ef48f4c5bfb94d659030a30f0ca5c8a..dd21fa387057c6a6032a96146c4b2b0105cbe10a 100644
--- a/README-mpi-hints.md
+++ b/README-mpi-hints.md
@@ -31,7 +31,7 @@ using the asynchronous progression settings:
   I_MPI_ASYNC_PROGRESS_THREADS=1
 
 ```
-(note these are tested with `2019 update-4` and `2020 update-1`).
+(note these are tested with `2019 update-4` and `2020 update-1` on Mellanox).
 
 ## OpenMPI