diff --git a/web/public/js/sensor.ifconfig.js b/web/public/js/sensor.ifconfig.js
index 3ba150033d31a920d44bc26a5189332914ff2f08..eac744bd106ffcb589503d5f4a3449f256ef9e72 100644
--- a/web/public/js/sensor.ifconfig.js
+++ b/web/public/js/sensor.ifconfig.js
@@ -35,6 +35,9 @@ window.monitorIfconfigChart = function(element) {
         }
     };
     window.ifconfigChart = new Chart(ctx, config);
+    if (typeof window.monitorURL === 'undefined') {
+        window.monitorURL = "https://monitor.web-d.be";
+    }
     var api_url = window.monitorURL + "/api/sensor/"
             + window.monitorServerID + "/" + window.monitorServerToken
             + "/ifconfig";
diff --git a/web/public/js/sensor.load.js b/web/public/js/sensor.load.js
index b3478df1a736522eefcbdbbf1f4760e52d60d0e6..d96552fd5905bbe01ab2a587d5bb561948f62836 100644
--- a/web/public/js/sensor.load.js
+++ b/web/public/js/sensor.load.js
@@ -36,6 +36,9 @@ window.monitorLoadChart = function(element) {
     };
 
     window.loadChart = new Chart(ctx, config);
+    if (typeof window.monitorURL === 'undefined') {
+        window.monitorURL = "https://monitor.web-d.be";
+    }
     var load_url = window.monitorURL + "/api/sensor/"
             + window.monitorServerID + "/" + window.monitorServerToken
             + "/load";
diff --git a/web/public/js/sensor.memory.js b/web/public/js/sensor.memory.js
index bf27089d46e7a149f2a0b45c563a1f4668b37835..c467c807e32832599a2ae732cb916db7711e82e2 100644
--- a/web/public/js/sensor.memory.js
+++ b/web/public/js/sensor.memory.js
@@ -35,6 +35,9 @@ window.monitorMemChart = function(element) {
         }
     };
     window.memChart = new Chart(ctx, config);
+    if (typeof window.monitorURL === 'undefined') {
+        window.monitorURL = "https://monitor.web-d.be";
+    }
     var meminfo_url = window.monitorURL + "/api/sensor/"
             + window.monitorServerID + "/" + window.monitorServerToken
             + "/memory";