diff --git a/packages/nuxt/src/app/composables/error.ts b/packages/nuxt/src/app/composables/error.ts
index 3c786b3379..019be2ccfe 100644
--- a/packages/nuxt/src/app/composables/error.ts
+++ b/packages/nuxt/src/app/composables/error.ts
@@ -56,7 +56,7 @@ export const clearError = async (options: { redirect?: string } = {}) => {
 
 /** @since 3.0.0 */
 export const isNuxtError = <DataT = unknown>(
-  error?: string | object,
+  error: unknown,
 ): error is NuxtError<DataT> => !!error && typeof error === 'object' && NUXT_ERROR_SIGNATURE in error
 
 /** @since 3.0.0 */