diff --git a/HowtoMunin.md b/HowtoMunin.md
index 38ccf924..62a0a7f6 100644
--- a/HowtoMunin.md
+++ b/HowtoMunin.md
@@ -500,7 +500,7 @@ Attention, le *plugin* `df` est différent du *plugin* `diskstats`.
 
 ~~~{ .bash }
 mkdir -p /etc/systemd/system/munin-node.service.d
-printf '[Service]\nProtectHome=false\n' | tee /etc/systemd/system/munin-node.service.d/override.conf
+printf '[Service]\nProtectHome=false\n' | tee -a /etc/systemd/system/munin-node.service.d/override.conf
 systemctl daemon-reload
 systemctl restart munin-node.service
 ~~~