diff --git a/src/components/Inputs/RulePath/index.jsx b/src/components/Inputs/RulePath/index.jsx
index 942ced69135..3a00369799a 100644
--- a/src/components/Inputs/RulePath/index.jsx
+++ b/src/components/Inputs/RulePath/index.jsx
@@ -70,7 +70,8 @@ export default class RulePath extends React.Component {
     const { onChange } = this.props
 
     const servicePort = get(value, 'backend.service.port.number')
-    if (isNumber(servicePort)) {
+
+    if (servicePort && isNumber(parseInt(servicePort, 10))) {
       set(value, 'backend.service.port.number', Number(servicePort))
     }