diff --git a/server/server.js b/server/server.js
index 021965a09..613b98f50 100644
--- a/server/server.js
+++ b/server/server.js
@@ -714,6 +714,11 @@ let needSetup = false;
                 bean.game = monitor.game;
                 bean.maxretries = monitor.maxretries;
                 bean.port = parseInt(monitor.port);
+
+                if (isNaN(bean.port)) {
+                    bean.port = null;
+                }
+
                 bean.keyword = monitor.keyword;
                 bean.ignoreTls = monitor.ignoreTls;
                 bean.expiryNotification = monitor.expiryNotification;