diff --git a/scripts/backup b/scripts/backup
index 2f76c7a..8a5a7fb 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -50,7 +50,10 @@ ynh_script_progression --message="Backing up the main app directory..." --weight
 ynh_script_progression --message="Backing up nginx web server configuration..." --weight=1
 
 ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
-ynh_backup --src_path="/etc/nginx/conf.d/${server_name}.d/server_name.conf"
+if yunohost --output-as plain domain list | grep -q "^$server_name$"
+then
+    ynh_backup --src_path="/etc/nginx/conf.d/${server_name}.d/server_name.conf"
+fi
 
 #=================================================
 # BACKUP THE POSTGRESQL DATABASE