diff --git a/packages/angular-query-experimental/src/infinite-query-options.ts b/packages/angular-query-experimental/src/infinite-query-options.ts
index 5b8844c78f..1245416539 100644
--- a/packages/angular-query-experimental/src/infinite-query-options.ts
+++ b/packages/angular-query-experimental/src/infinite-query-options.ts
@@ -3,6 +3,7 @@ import type {
   DefaultError,
   InfiniteData,
   InitialDataFunction,
+  NonUndefinedGuard,
   OmitKeyof,
   QueryKey,
   SkipToken,
@@ -61,8 +62,6 @@ export type UnusedSkipTokenInfiniteOptions<
   >
 }
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataInfiniteOptions<
   TQueryFnData,
   TError = DefaultError,
diff --git a/packages/angular-query-experimental/src/query-options.ts b/packages/angular-query-experimental/src/query-options.ts
index 2c48f49711..e82540bee5 100644
--- a/packages/angular-query-experimental/src/query-options.ts
+++ b/packages/angular-query-experimental/src/query-options.ts
@@ -2,6 +2,7 @@ import type {
   DataTag,
   DefaultError,
   InitialDataFunction,
+  NonUndefinedGuard,
   OmitKeyof,
   QueryFunction,
   QueryKey,
@@ -36,8 +37,6 @@ export type UnusedSkipTokenOptions<
   >
 }
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataOptions<
   TQueryFnData = unknown,
   TError = DefaultError,
diff --git a/packages/query-core/src/types.ts b/packages/query-core/src/types.ts
index dfde4ef867..735b8ea263 100644
--- a/packages/query-core/src/types.ts
+++ b/packages/query-core/src/types.ts
@@ -9,6 +9,8 @@ import type { QueryFilters, QueryTypeFilter, SkipToken } from './utils'
 import type { QueryCache } from './queryCache'
 import type { MutationCache } from './mutationCache'
 
+export type NonUndefinedGuard<T> = T extends undefined ? never : T
+
 export type DistributiveOmit<
   TObject,
   TKey extends keyof TObject,
diff --git a/packages/react-query/src/infiniteQueryOptions.ts b/packages/react-query/src/infiniteQueryOptions.ts
index d834bd5987..18d3d655b0 100644
--- a/packages/react-query/src/infiniteQueryOptions.ts
+++ b/packages/react-query/src/infiniteQueryOptions.ts
@@ -3,6 +3,7 @@ import type {
   DefaultError,
   InfiniteData,
   InitialDataFunction,
+  NonUndefinedGuard,
   OmitKeyof,
   QueryKey,
   SkipToken,
@@ -61,8 +62,6 @@ export type UnusedSkipTokenInfiniteOptions<
   >
 }
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataInfiniteOptions<
   TQueryFnData,
   TError = DefaultError,
diff --git a/packages/react-query/src/queryOptions.ts b/packages/react-query/src/queryOptions.ts
index 1e7b4aa83a..644ac26788 100644
--- a/packages/react-query/src/queryOptions.ts
+++ b/packages/react-query/src/queryOptions.ts
@@ -2,6 +2,7 @@ import type {
   DataTag,
   DefaultError,
   InitialDataFunction,
+  NonUndefinedGuard,
   OmitKeyof,
   QueryFunction,
   QueryKey,
@@ -36,8 +37,6 @@ export type UnusedSkipTokenOptions<
   >
 }
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataOptions<
   TQueryFnData = unknown,
   TError = DefaultError,
diff --git a/packages/solid-query/src/infiniteQueryOptions.ts b/packages/solid-query/src/infiniteQueryOptions.ts
index 97bea33c13..2cb1fea1f5 100644
--- a/packages/solid-query/src/infiniteQueryOptions.ts
+++ b/packages/solid-query/src/infiniteQueryOptions.ts
@@ -2,6 +2,7 @@ import type {
   DataTag,
   DefaultError,
   InfiniteData,
+  NonUndefinedGuard,
   QueryKey,
 } from '@tanstack/query-core'
 import type { SolidInfiniteQueryOptions } from './types'
@@ -26,8 +27,6 @@ export type UndefinedInitialDataInfiniteOptions<
   }
 >
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataInfiniteOptions<
   TQueryFnData,
   TError = DefaultError,
diff --git a/packages/svelte-query/src/queryOptions.ts b/packages/svelte-query/src/queryOptions.ts
index dc4beb2951..e1a44be631 100644
--- a/packages/svelte-query/src/queryOptions.ts
+++ b/packages/svelte-query/src/queryOptions.ts
@@ -2,6 +2,7 @@ import type {
   DataTag,
   DefaultError,
   InitialDataFunction,
+  NonUndefinedGuard,
   QueryKey,
 } from '@tanstack/query-core'
 import type { CreateQueryOptions } from './types.js'
@@ -15,8 +16,6 @@ export type UndefinedInitialDataOptions<
   initialData?: undefined | InitialDataFunction<NonUndefinedGuard<TQueryFnData>>
 }
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataOptions<
   TQueryFnData = unknown,
   TError = DefaultError,
diff --git a/packages/vue-query/src/infiniteQueryOptions.ts b/packages/vue-query/src/infiniteQueryOptions.ts
index dbe296e1af..220fd37563 100644
--- a/packages/vue-query/src/infiniteQueryOptions.ts
+++ b/packages/vue-query/src/infiniteQueryOptions.ts
@@ -2,6 +2,7 @@ import type {
   DataTag,
   DefaultError,
   InfiniteData,
+  NonUndefinedGuard,
   QueryKey,
 } from '@tanstack/query-core'
 import type { UseInfiniteQueryOptions } from './useInfiniteQuery'
@@ -23,8 +24,6 @@ export type UndefinedInitialDataInfiniteOptions<
   initialData?: undefined
 }
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type DefinedInitialDataInfiniteOptions<
   TQueryFnData,
   TError = DefaultError,
diff --git a/packages/vue-query/src/useQuery.ts b/packages/vue-query/src/useQuery.ts
index fd60dee2ee..168eb36095 100644
--- a/packages/vue-query/src/useQuery.ts
+++ b/packages/vue-query/src/useQuery.ts
@@ -4,6 +4,7 @@ import type {
   DefaultError,
   DefinedQueryObserverResult,
   InitialDataFunction,
+  NonUndefinedGuard,
   QueryKey,
   QueryObserverOptions,
 } from '@tanstack/query-core'
@@ -16,8 +17,6 @@ import type {
 } from './types'
 import type { QueryClient } from './queryClient'
 
-type NonUndefinedGuard<T> = T extends undefined ? never : T
-
 export type UseQueryOptions<
   TQueryFnData = unknown,
   TError = DefaultError,