diff --git a/index.js b/index.js
index bd093d0..05cbd9a 100644
--- a/index.js
+++ b/index.js
@@ -6,7 +6,6 @@ var dev = process.env.NODE_ENV == "development";
 var handle = function () {
   throw nextError;
 }
-var appPreparationError = null;
 var isPrepared = false;
 var configJSON = {};
 
@@ -49,7 +48,7 @@ try {
       handle = initResponse[0];
       isPrepared = true;
     } catch (err) {
-      appPreparationError = err;
+      nextError = err;
     }
   }
   init();
@@ -77,7 +76,7 @@ try {
     app.prepare().then(function () {
       isPrepared = true;
     }).catch(function (err) {
-      appPreparationError = err;
+      nextError = err;
     });
   } catch (err) {
     nextError = err;
@@ -89,7 +88,7 @@ function Mod() {}
 Mod.prototype.callback = function callback(req, res, serverconsole, responseEnd, href, ext, uobject, search, defaultpage, users, page404, head, foot, fd, elseCallback, configJSON, callServerError, getCustomHeaders, origHref, redirect, parsePostData) {
   return async function () {
     try {
-      if (appPreparationError) throw appPreparationError;
+      if (nextError) throw nextError;
       if (!isPrepared) {
         callServerError(503, "nextjs-integration/1.0.0");
         serverconsole.errmessage("Next.js application not yet fully loaded.");