diff --git a/packages/nextjs/src/config/wrappers/utils/responseEnd.ts b/packages/nextjs/src/config/wrappers/utils/responseEnd.ts
index 21d5f5d850a5..82b6fb69ea28 100644
--- a/packages/nextjs/src/config/wrappers/utils/responseEnd.ts
+++ b/packages/nextjs/src/config/wrappers/utils/responseEnd.ts
@@ -31,7 +31,8 @@ export function autoEndTransactionOnResponseEnd(transaction: Transaction, res: S
   };
 
   // Prevent double-wrapping
-  if (!(res.end as WrappedResponseEndMethod).__sentry_original__) {
+  // res.end may be undefined during build when using `next export` to statically export a Next.js app
+  if (res.end && !(res.end as WrappedResponseEndMethod).__sentry_original__) {
     fill(res, 'end', wrapEndMethod);
   }
 }