diff --git a/pandora_console/include/graphs/pandora.d3.js b/pandora_console/include/graphs/pandora.d3.js
index a334a85357..9607397ea2 100644
--- a/pandora_console/include/graphs/pandora.d3.js
+++ b/pandora_console/include/graphs/pandora.d3.js
@@ -1169,7 +1169,7 @@ function createGauges(data, width, height, font_size, no_data_image, font) {
     maxinum,
     valor;
 
-  for (key in data) {
+  for (var key in data) {
     nombre = data[key].gauge;
 
     label = data[key].label;
@@ -1189,8 +1189,8 @@ function createGauges(data, width, height, font_size, no_data_image, font) {
     mininum = round_with_decimals(parseFloat(data[key].min));
     maxinum = round_with_decimals(parseFloat(data[key].max));
 
-    critical_inverse = parseInt(data[key].critical_inverse);
-    warning_inverse = parseInt(data[key].warning_inverse);
+    var critical_inverse = parseInt(data[key].critical_inverse);
+    var warning_inverse = parseInt(data[key].warning_inverse);
 
     valor = round_with_decimals(data[key].value);
 
diff --git a/pandora_console/include/javascript/pandora.js b/pandora_console/include/javascript/pandora.js
index 6a29b6b552..391ed961ef 100644
--- a/pandora_console/include/javascript/pandora.js
+++ b/pandora_console/include/javascript/pandora.js
@@ -1763,7 +1763,7 @@ function round_with_decimals(value, multiplier) {
   if (typeof multiplier === "undefined") multiplier = 1;
 
   // Return non numeric types without modification
-  if (typeof value !== "number" || Number.isNaN(value)) {
+  if (typeof value !== "number" || isNaN(value)) {
     return value;
   }