diff --git a/tools/bench/plafrim/run.sh b/tools/bench/plafrim/run.sh
index 11893bed24dadfed9cb75bdf34274604cce78996..55ca0278540885f5434ecb0c62634dbdc3bbb1b6 100755
--- a/tools/bench/plafrim/run.sh
+++ b/tools/bench/plafrim/run.sh
@@ -49,7 +49,7 @@ fi
 export MPI_OPTIONS=""
 if [ $MPI = "openmpi" ]
 then
-  export MPI_OPTIONS="--map-by ppr:1:node:pe=$SLURM_JOB_CPUS_PER_NODE"
+  export MPI_OPTIONS="--bind-to board"
   GUIX_ENV_MPI=""
   GUIX_ADHOC_MPI="openssh openmpi"
 elif [ $MPI = "nmad" ]