diff --git a/sysadmin/grid5000/cassandra/02-add_best_effort_node.sh b/sysadmin/grid5000/cassandra/02-add_best_effort_node.sh
index f713a3d..bfe9c30 100755
--- a/sysadmin/grid5000/cassandra/02-add_best_effort_node.sh
+++ b/sysadmin/grid5000/cassandra/02-add_best_effort_node.sh
@@ -1,15 +1,17 @@
 #!/usr/bin/env bash
 
 set -eu
 
 SCRIPT_DIR="$(pwd $(dirname @0))"
 
 source "${SCRIPT_DIR}/environment.cfg"
 
 EXCLUDED_HOSTS=""
 
-for h in ${BEST_EFFORT_EXCLUDED_NODES}; do
+TO_EXCLUDE="$(echo ${BEST_EFFORT_EXCLUDED_NODES} | sed 's/,/ /g')"
+
+for h in ${TO_EXCLUDE}; do
   EXCLUDED_HOSTS="${EXCLUDED_HOSTS},'${h}.${G5K_SITE}'"
 done
 EXCLUDED_HOSTS="$(echo ${EXCLUDED_HOSTS} | cut -b2-)"
 oarsub -l "{cluster='${BEST_EFFORT_CLUSTER}' and host not in (${EXCLUDED_HOSTS})}/nodes=1,walltime=12" -t deploy -t besteffort ${SCRIPT_DIR}/03-deploy_besteffort_nodes.sh