diff --git a/packages/node_modules/@node-red/nodes/core/network/05-tls.js b/packages/node_modules/@node-red/nodes/core/network/05-tls.js
index 5a3147af6..0c588fc66 100644
--- a/packages/node_modules/@node-red/nodes/core/network/05-tls.js
+++ b/packages/node_modules/@node-red/nodes/core/network/05-tls.js
@@ -32,8 +32,7 @@ module.exports = function(RED) {
         this.alpnprotocol = (n.alpnprotocol||"").trim();
 
         if ((certPath && certPath.length > 0) || (keyPath && keyPath.length > 0) || (caPath && caPath.length > 0)) {
-
-            if ( (certPath.length > 0) !== (keyPath.length > 0)) {
+            if ( (certPath && certPath.length > 0) !== (keyPath && keyPath.length > 0)) {
                 this.valid = false;
                 this.error(RED._("tls.error.missing-file"));
                 return;