diff --git a/imageroot/actions/restore-module/60systemd b/imageroot/actions/restore-module/60systemd
index e6a81be..51c097a 100755
--- a/imageroot/actions/restore-module/60systemd
+++ b/imageroot/actions/restore-module/60systemd
@@ -60,7 +60,7 @@ subprocess.run(["systemctl", "--user", "restart", "nginx.service"])
 
 # we test if the port is not in use with the previous module
 # sftpgo.service is a standalone service without require from other services
-port = os.environ['SFTP_TCP_PORT']
+port = int(os.environ['SFTP_TCP_PORT'])
 if not is_port_in_use(port):
     start_service()
 else: