diff --git a/packages/pinia/__tests__/mapHelpers.spec.ts b/packages/pinia/__tests__/mapHelpers.spec.ts
index 11a5b415f2..6c532857ef 100644
--- a/packages/pinia/__tests__/mapHelpers.spec.ts
+++ b/packages/pinia/__tests__/mapHelpers.spec.ts
@@ -10,7 +10,7 @@ import {
   setMapStoreSuffix,
 } from '../src'
 import { mount } from '@vue/test-utils'
-import { nextTick, defineComponent } from 'vue'
+import { nextTick, defineComponent, ref, computed } from 'vue'
 import { mockWarn } from './vitest-mock-warn'
 
 describe('Map Helpers', () => {
@@ -245,5 +245,34 @@ describe('Map Helpers', () => {
         'replaced replaced'
       )
     })
+
+    it('setup store', async () => {
+      const useSetupStore = defineStore('setup', () => {
+        const a = ref(true)
+        const n = ref(0)
+
+        const double = computed({
+          get: () => n.value + n.value,
+          set: (v) => {
+            n.value = v
+          },
+        })
+        const notA = computed({
+          get: () => !a.value,
+          set: (v) => {
+            a.value = v
+          },
+        })
+
+        return { a, n, double, notA }
+      })
+
+      await testComponent(
+        mapWritableState(useSetupStore, ['n', 'a', 'double', 'notA']),
+        `{{ n }} {{ a }} {{ double }} {{ notA }}`,
+        `0 true 0 false`,
+        'replaced replaced replacedreplaced false'
+      )
+    })
   })
 })
diff --git a/packages/pinia/src/types.ts b/packages/pinia/src/types.ts
index 4ca20da9e3..017eca6af4 100644
--- a/packages/pinia/src/types.ts
+++ b/packages/pinia/src/types.ts
@@ -572,7 +572,11 @@ export type _ActionsTree = Record<string, _Method>
  * For internal use **only**
  */
 export type _ExtractStateFromSetupStore_Keys<SS> = keyof {
-  [K in keyof SS as SS[K] extends _Method | ComputedRef ? never : K]: any
+  [K in keyof SS as SS[K] extends _Method | ComputedRef
+    ? SS[K] extends WritableComputedRef<any>
+      ? K
+      : never
+    : K]: any
 }
 
 /**
diff --git a/packages/pinia/test-dts/mapHelpers.test-d.ts b/packages/pinia/test-dts/mapHelpers.test-d.ts
index 3d2770a05e..924be8aa8d 100644
--- a/packages/pinia/test-dts/mapHelpers.test-d.ts
+++ b/packages/pinia/test-dts/mapHelpers.test-d.ts
@@ -9,8 +9,7 @@ import {
   TypeEqual,
 } from './'
 
-const useOptionsStore = defineStore({
-  id: 'name',
+const useOptionsStore = defineStore('name', {
   state: () => ({ a: 'on' as 'on' | 'off', nested: { counter: 0 } }),
   getters: {
     upper: (state) => state.a.toUpperCase(),
@@ -29,22 +28,28 @@ const useOptionsStore = defineStore({
 const useSetupStore = defineStore('setupStore', () => {
   const a = ref('on' as 'on' | 'off')
   const upper = computed(() => a.value.toUpperCase())
+  const writableUpper = computed({
+    get() {
+      return a.value.toUpperCase() as 'on' | 'off'
+    },
+    set(value: 'on' | 'off') {
+      a.value = value
+    },
+  })
   function toggleA() {
     a.value = a.value === 'off' ? 'on' : 'off'
   }
   function setToggle(aVal: 'on' | 'off') {
     return (a.value = aVal)
   }
-  return { a, upper, toggleA, setToggle }
+  return { a, upper, writableUpper, toggleA, setToggle }
 })
 
-const useCounter = defineStore({
-  id: 'counter',
+const useCounter = defineStore('counter', {
   state: () => ({ n: 0 }),
 })
 
-const useStoreDos = defineStore({
-  id: 'dos',
+const useStoreDos = defineStore('dos', {
   state: () => ({}),
 })
 
@@ -167,3 +172,24 @@ expectType<
     typeof setupStoreWithGetters
   >
 >(true)
+
+const setupStoreWithWritableGetters = mapWritableState(useSetupStore, [
+  'a',
+  'writableUpper',
+])
+
+expectType<
+  TypeEqual<
+    {
+      a: {
+        get: () => 'on' | 'off'
+        set: (v: 'on' | 'off') => any
+      }
+      writableUpper: {
+        get: () => 'on' | 'off'
+        set: (v: 'on' | 'off') => any
+      }
+    },
+    typeof setupStoreWithWritableGetters
+  >
+>(true)