diff --git a/common/borgbackup/templates/borgbackup-prometheus.sh b/common/borgbackup/templates/borgbackup-prometheus.sh
index 497ad3f6e5e7fa9b07e27032d7586da118f7a27b..a76d76127400c2631d9b501fd7cb4836c7a886ad 100644
--- a/common/borgbackup/templates/borgbackup-prometheus.sh
+++ b/common/borgbackup/templates/borgbackup-prometheus.sh
@@ -3,6 +3,9 @@
 export BORG_PASSPHRASE="{{repo_passphrase}}"
 export BORG_RSH="ssh -i /srv/borgbackup/repo_sshkey"
 
+# Force locale for correct formatting
+LANG=en_US.UTF-8
+
 # Metrics output file in the prometheus node-exporter directory 
 PROM_FILE="/var/lib/prometheus/node-exporter/borgbackup.prom"