diff --git a/packages/node_modules/@node-red/nodes/core/function/10-function.js b/packages/node_modules/@node-red/nodes/core/function/10-function.js
index cc06ab560..bbc8d498e 100644
--- a/packages/node_modules/@node-red/nodes/core/function/10-function.js
+++ b/packages/node_modules/@node-red/nodes/core/function/10-function.js
@@ -374,7 +374,7 @@ module.exports = function(RED) {
                         iniOpt.breakOnSigint = true;
                     }
                 }
-                node.script = vm.Script(functionText, {filename: createVMOpt(node, "")});
+                node.script = new vm.Script(functionText, {filename: createVMOpt(node, "")});
                 if (node.fin && (node.fin !== "")) {
                     var finText = `(function () {
                         var node = {