diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0272f2f38..0e9963cbc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ For changes prior to v1.0.0, see the [legacy releases](https://legacy.inertiajs.
 
 ## [Unreleased](https://github.com/inertiajs/inertia/compare/v1.1.0...HEAD)
 
+- Fix `preserveScroll` and `preserveState` types ([#1882](https://github.com/inertiajs/inertia/pull/1882))
 - Add Svelte TypeScript support ([#1866](https://github.com/inertiajs/inertia/pull/1866))
 
 ## [v1.1.0](https://github.com/inertiajs/inertia/compare/v1.0.16...v1.1.0)
diff --git a/packages/core/src/router.ts b/packages/core/src/router.ts
index 48a4e1893..1fc19d1dc 100644
--- a/packages/core/src/router.ts
+++ b/packages/core/src/router.ts
@@ -236,7 +236,7 @@ export class Router {
     }
   }
 
-  protected resolvePreserveOption(value: PreserveStateOption, page: Page): boolean | string {
+  protected resolvePreserveOption(value: PreserveStateOption, page: Page): boolean {
     if (typeof value === 'function') {
       return value(page)
     } else if (value === 'errors') {
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index cba9d687b..1f77ddbdd 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -55,7 +55,7 @@ export type PageHandler = ({
   preserveState: PreserveStateOption
 }) => Promise<unknown>
 
-export type PreserveStateOption = boolean | string | ((page: Page) => boolean)
+export type PreserveStateOption = boolean | 'errors' | ((page: Page) => boolean)
 
 export type Progress = AxiosProgressEvent