diff --git a/packages/next/src/build/webpack/plugins/flight-types-plugin.ts b/packages/next/src/build/webpack/plugins/flight-types-plugin.ts
index c530248ac0..ff8fd1d884 100644
--- a/packages/next/src/build/webpack/plugins/flight-types-plugin.ts
+++ b/packages/next/src/build/webpack/plugins/flight-types-plugin.ts
@@ -29,7 +29,7 @@ type TEntry = typeof entry
 
 check<IEntry, TEntry>(entry)
 
-type PageParams = Record<string, string>
+type PageParams = any
 interface PageProps {
   params: any
   searchParams?: any
@@ -54,7 +54,7 @@ interface IEntry {
       : `default: PageComponent`
   }
   config?: {}
-  generateStaticParams?: (params?: PageParams) => any[] | Promise<any[]>
+  generateStaticParams?: (args: { params: PageParams }) => any[] | Promise<any[]>
   revalidate?: RevalidateRange<TEntry> | false
   dynamic?: 'auto' | 'force-dynamic' | 'error' | 'force-static'
   dynamicParams?: boolean
diff --git a/test/e2e/app-dir/app-alias/src/app/typing/[slug]/page.tsx b/test/e2e/app-dir/app-alias/src/app/typing/[slug]/page.tsx
new file mode 100644
index 0000000000..61d4e7a3d0
--- /dev/null
+++ b/test/e2e/app-dir/app-alias/src/app/typing/[slug]/page.tsx
@@ -0,0 +1,12 @@
+export default function page() {
+  return 'typing'
+}
+
+export async function generateStaticParams({
+  params,
+}: {
+  params: { slug: 'a' | 'b' }
+}) {
+  console.log(params)
+  return []
+}