diff --git a/.changeset/fix-evlog-error-handler-compat.md b/.changeset/fix-evlog-error-handler-compat.md
new file mode 100644
index 0000000..bc385aa
--- /dev/null
+++ b/.changeset/fix-evlog-error-handler-compat.md
@@ -0,0 +1,7 @@
+---
+"evlog": patch
+---
+
+fix(nitro): make `evlogErrorHandler` compatible with TanStack Start's `createMiddleware().server()` API
+
+`evlogErrorHandler` now accepts both `(next)` and `({ next })` signatures, so `createMiddleware().server(evlogErrorHandler)` works directly without a wrapper in all TanStack Start versions.
diff --git a/packages/evlog/src/nitro-v3/middleware.ts b/packages/evlog/src/nitro-v3/middleware.ts
index d7eb370..b21c095 100644
--- a/packages/evlog/src/nitro-v3/middleware.ts
+++ b/packages/evlog/src/nitro-v3/middleware.ts
@@ -23,7 +23,8 @@ import { serializeEvlogErrorResponse } from '../nitro'
  * ```
  */
 
-export async function evlogErrorHandler<T>(next: (...args: any[]) => Promise<T>): Promise<T> {
+export async function evlogErrorHandler<T>(nextOrOptions: ((...args: any[]) => Promise<T>) | { next: (...args: any[]) => Promise<T> }): Promise<T> {
+  const next = typeof nextOrOptions === 'function' ? nextOrOptions : nextOrOptions.next
   try {
     return await next()
   } catch (error: unknown) {