diff --git a/index.js b/index.js
index 05cbd9a..1314092 100644
--- a/index.js
+++ b/index.js
@@ -37,11 +37,14 @@ try {
   }
   async function init() {
     try {
+      var checkNodeDebugType = function() {return null};
+      if (nextServerUtil.getNodeDebugType) checkNodeDebugType = nextServerUtil.getNodeDebugType;
+      if (nextServerUtil.checkNodeDebugType) checkNodeDebugType = nextServerUtil.checkNodeDebugType;
       initResponse = await routerServer.initialize({
         dir: process.cwd(),
         port: port,
         dev: dev,
-        isNodeDebugging: Boolean(nextServerUtil.checkNodeDebugType()) || false,
+        isNodeDebugging: Boolean(checkNodeDebugType()) || false,
         startServerSpan: undefined,
         experimentalHttpsServer: useHTTPS
       });