diff --git a/packages/next/src/build/segment-config/app/app-segment-config.ts b/packages/next/src/build/segment-config/app/app-segment-config.ts
index a0d5ae10d333..7fc2ab07f9d9 100644
--- a/packages/next/src/build/segment-config/app/app-segment-config.ts
+++ b/packages/next/src/build/segment-config/app/app-segment-config.ts
@@ -30,11 +30,7 @@ const InstantConfigObjectSchema = z
   })
   .strict()
 
-const InstantConfigSchema = z.union([
-  InstantConfigObjectSchema,
-  z.literal(true),
-  z.literal(false),
-])
+const InstantConfigSchema = z.union([InstantConfigObjectSchema, z.boolean()])
 
 const PrefetchSchema = z.enum([
   'auto',
@@ -43,7 +39,7 @@ const PrefetchSchema = z.enum([
   'force-runtime',
 ])
 
-export type Instant = InstantConfig | true | false
+export type Instant = InstantConfig | boolean
 
 export type Prefetch =
   | 'auto'
diff --git a/packages/next/src/server/config-shared.ts b/packages/next/src/server/config-shared.ts
index 077f90d8eca5..9226116985f2 100644
--- a/packages/next/src/server/config-shared.ts
+++ b/packages/next/src/server/config-shared.ts
@@ -439,6 +439,12 @@ export function resolveCssChunkingMode(
   return 'loose'
 }
 
+export type ValidationLevel =
+  | 'warning'
+  | 'manual-warning'
+  | 'experimental-error'
+  | 'experimental-manual-error'
+
 export interface ExperimentalConfig {
   /**
    * A string that is incorporated into content-addressed output filenames
@@ -1357,13 +1363,6 @@ export type ExportPathMap = {
  *
  * Read more: [Next.js Docs: `next.config.js`](https://nextjs.org/docs/app/api-reference/config/next-config-js)
  */
-
-export type ValidationLevel =
-  | 'warning'
-  | 'manual-warning'
-  | 'experimental-error'
-  | 'experimental-manual-error'
-
 export interface NextConfig {
   allowedDevOrigins?: string[]