diff --git a/scripts/restore b/scripts/restore
index 2a5534a..ffc6870 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -74,7 +74,7 @@ ynh_script_progression --message="Restoring fail2ban configuration..."
 # If it doesn't exist, create the logfile, required before configuring fail2ban
 log4fail2ban="/var/log/nginx/${domain}-access.log"
 ynh_restore_file --origin_path="${log4fail2ban}"
-if [ ! -f "${log4fail2ban}" ]; then
+if [ ! -f "${log4fail2ban:-}" ]; then
     touch "${log4fail2ban}"
 fi
 
diff --git a/scripts/upgrade b/scripts/upgrade
index c96c558..ad8ddd4 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -107,7 +107,7 @@ ynh_script_progression --message="Upgrading fail2ban configuration..."
 
 # If it doesn't exist, create the logfile, required before configuring fail2ban
 log4fail2ban="/var/log/nginx/${domain}-access.log"
-if [ ! -f "${log4fail2ban}" ]; then
+if [ ! -f "${log4fail2ban:-}" ]; then
 	touch "${log4fail2ban}"
 fi