diff --git a/docs/framework/angular/typescript.md b/docs/framework/angular/typescript.md
index 6a10e940bdb..0aa2ff26388 100644
--- a/docs/framework/angular/typescript.md
+++ b/docs/framework/angular/typescript.md
@@ -153,7 +153,8 @@ import '@tanstack/angular-query-experimental'
 
 declare module '@tanstack/angular-query-experimental' {
   interface Register {
-    defaultError: AxiosError
+    // Use unknown so call sites must narrow explicitly.
+    defaultError: unknown
   }
 }
 
@@ -164,7 +165,7 @@ const query = injectQuery(() => ({
 
 computed(() => {
   const error = query.error()
-  //      ^? error: AxiosError | null
+  //      ^? error: unknown | null
 })
 ```
 
diff --git a/docs/framework/react/typescript.md b/docs/framework/react/typescript.md
index 98a5c3e8ea2..cddd6e6b97b 100644
--- a/docs/framework/react/typescript.md
+++ b/docs/framework/react/typescript.md
@@ -130,7 +130,7 @@ if (axios.isAxiosError(error)) {
 
 ### Registering a global Error
 
-TanStack Query v5 allows for a way to set a global Error type for everything, without having to specify generics on call-sides, by amending the `Register` interface. This will make sure inference still works, but the error field will be of the specified type:
+TanStack Query v5 allows for a way to set a global Error type for everything, without having to specify generics on call-sides, by amending the `Register` interface. This will make sure inference still works, but the error field will be of the specified type. If you want to enforce that call-sides must do explicit type-narrowing, set `defaultError` to `unknown`:
 
 [//]: # 'RegisterErrorType'
 
@@ -139,12 +139,13 @@ import '@tanstack/react-query'
 
 declare module '@tanstack/react-query' {
   interface Register {
-    defaultError: AxiosError
+    // Use unknown so call sites must narrow explicitly.
+    defaultError: unknown
   }
 }
 
 const { error } = useQuery({ queryKey: ['groups'], queryFn: fetchGroups })
-//      ^? const error: AxiosError | null
+//      ^? const error: unknown | null
 ```
 
 [//]: # 'RegisterErrorType'
diff --git a/docs/framework/solid/typescript.md b/docs/framework/solid/typescript.md
index aa6bd28a8fc..67711cbabcf 100644
--- a/docs/framework/solid/typescript.md
+++ b/docs/framework/solid/typescript.md
@@ -129,16 +129,15 @@ if (axios.isAxiosError(query.error)) {
 
 [typescript playground](https://www.typescriptlang.org/play/?#code/JYWwDg9gTgLgBAbzgYygUwIYzQRQK5pQCecAvnAGZQQhwDkAAjBgHYDOzyA1gPRsQAbYABMAtAEcCxOgFgAUKEiw4GAB7AIbStVp01GtrLnyYRMGjgBxanjBwAvIjgiAXHBZ4QAI0Jl585Ah2eAo0GGQAC2sIWy1HAAoASjcABR1gNjQAHmjbAG0AXQA+BxL9TQA6AHMw+LoeKpswQ0SKmAi0Fnj0Nkh2C3sSnr7MiuEsDET-OUDguElCEkdUTGx8Rfik0rh4hHk4A-mpIgBpNCI3PLpGmOa6AoAaOH3DheIAMRY3UPCoprYHvJSIkpsY5G8iBVCNQoPIeDxDnAAHoAfmmwAoO3KbAqGQAgupNABRKAw+IQqGk6AgxAvA4U6HQOlweGI1FA+RAA)
 
-## Registering a global `Error`
-
-TanStack Query v5 allows for a way to set a global Error type for everything, without having to specify generics on call-sides, by amending the `Register` interface. This will make sure inference still works, but the error field will be of the specified type:
+[//]: # 'RegisterErrorType'
 
 ```tsx
 import '@tanstack/solid-query'
 
 declare module '@tanstack/solid-query' {
   interface Register {
-    defaultError: AxiosError
+    // Use unknown so call sites must narrow explicitly.
+    defaultError: unknown
   }
 }
 
@@ -148,9 +147,11 @@ const query = useQuery(() => ({
 }))
 
 query.error
-//    ^? (property) error: AxiosError | null
+//    ^? (property) error: unknown | null
 ```
 
+[//]: # 'RegisterErrorType'
+
 ## Registering global `Meta`
 
 Similarly to registering a [global error type](#registering-a-global-error) you can also register a global `Meta` type. This ensures the optional `meta` field on [queries](../reference/useQuery.md) and [mutations](../reference/useMutation.md) stays consistent and is type-safe. Note that the registered type must extend `Record<string, unknown>` so that `meta` remains an object.
diff --git a/docs/framework/vue/typescript.md b/docs/framework/vue/typescript.md
index 731c276a244..7cf70dbc4f3 100644
--- a/docs/framework/vue/typescript.md
+++ b/docs/framework/vue/typescript.md
@@ -89,6 +89,21 @@ if (error.value instanceof Error) {
 [//]: # 'TypingError3'
 [//]: # 'TypingError3'
 [//]: # 'RegisterErrorType'
+
+```tsx
+import '@tanstack/vue-query'
+
+declare module '@tanstack/vue-query' {
+  interface Register {
+    // Use unknown so call sites must narrow explicitly.
+    defaultError: unknown
+  }
+}
+
+const { error } = useQuery({ queryKey: ['groups'], queryFn: fetchGroups })
+//      ^? const error: unknown | null
+```
+
 [//]: # 'RegisterErrorType'
 [//]: # 'TypingMeta'
 [//]: # 'TypingMeta'