diff --git a/scripts/backup b/scripts/backup
index 4a2baa1..2f181ef 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -54,7 +54,7 @@ ynh_script_progression --message="Backing up nginx web server configuration..."
 ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 if yunohost --output-as plain domain list | grep -q "^$server_name$"
 then
-    ynh_backup --src_path="/etc/nginx/conf.d/${server_name}.d/server_name.conf"
+    ynh_backup --src_path="/etc/nginx/conf.d/${server_name}.d/${app}_server_name.conf"
 fi
 
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