diff --git a/aspida.config.js b/aspida.config.js
index cd9665b5..b9f7fcdb 100644
--- a/aspida.config.js
+++ b/aspida.config.js
@@ -33,5 +33,10 @@ module.exports = [
     input: 'samples/nullable-object',
     outputEachDir: true,
     openapi: { inputFile: 'samples/nullable-object.yml' }
+  },
+  {
+    input: 'samples/array-one-of',
+    outputEachDir: true,
+    openapi: { inputFile: 'samples/array-one-of.yml' }
   }
 ]
diff --git a/samples/array-one-of.yml b/samples/array-one-of.yml
new file mode 100644
index 00000000..99699f45
--- /dev/null
+++ b/samples/array-one-of.yml
@@ -0,0 +1,44 @@
+openapi: 3.0.0
+info:
+  version: "1.0.0"
+  title: "Sample"
+paths:
+  /user:
+    get:
+      responses:
+        "200":
+          description: "sample"
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  user:
+                    nullable: true
+                    anyOf:
+                      - $ref: "#/components/schemas/User"
+components:
+  schemas:
+    User:
+      type: object
+      properties:
+        id:
+          type: string
+        roles:
+          type: array
+          items:
+            oneOf:
+              - $ref: "#/components/schemas/RoleA"
+              - $ref: "#/components/schemas/RoleB"
+    RoleA:
+      type: object
+      properties:
+        name:
+          type: string
+    RoleB:
+      type: object
+      properties:
+        name:
+          type: string
+        authority:
+          type: string
diff --git a/samples/array-one-of/$api.ts b/samples/array-one-of/$api.ts
new file mode 100644
index 00000000..a7a7f008
--- /dev/null
+++ b/samples/array-one-of/$api.ts
@@ -0,0 +1,33 @@
+/* eslint-disable */
+// prettier-ignore
+import { AspidaClient, BasicHeaders } from 'aspida'
+// prettier-ignore
+import { Methods as Methods0 } from './user'
+
+// prettier-ignore
+const api = <T>({ baseURL, fetch }: AspidaClient<T>) => {
+  const prefix = (baseURL === undefined ? '' : baseURL).replace(/\/$/, '')
+  const PATH0 = '/user'
+  const GET = 'GET'
+
+  return {
+    user: {
+      /**
+       * @returns sample
+       */
+      get: (option?: { config?: T }) =>
+        fetch<Methods0['get']['resBody'], BasicHeaders, Methods0['get']['status']>(prefix, PATH0, GET, option).json(),
+      /**
+       * @returns sample
+       */
+      $get: (option?: { config?: T }) =>
+        fetch<Methods0['get']['resBody'], BasicHeaders, Methods0['get']['status']>(prefix, PATH0, GET, option).json().then(r => r.body),
+      $path: () => `${prefix}${PATH0}`
+    }
+  }
+}
+
+// prettier-ignore
+export type ApiInstance = ReturnType<typeof api>
+// prettier-ignore
+export default api
diff --git a/samples/array-one-of/@types/index.ts b/samples/array-one-of/@types/index.ts
new file mode 100644
index 00000000..ce3215ce
--- /dev/null
+++ b/samples/array-one-of/@types/index.ts
@@ -0,0 +1,14 @@
+/* eslint-disable */
+export type User = {
+  id: string
+  roles: (RoleA | RoleB)[]
+}
+
+export type RoleA = {
+  name: string
+}
+
+export type RoleB = {
+  name: string
+  authority: string
+}
diff --git a/samples/array-one-of/user/$api.ts b/samples/array-one-of/user/$api.ts
new file mode 100644
index 00000000..7a848ee5
--- /dev/null
+++ b/samples/array-one-of/user/$api.ts
@@ -0,0 +1,31 @@
+/* eslint-disable */
+// prettier-ignore
+import { AspidaClient, BasicHeaders } from 'aspida'
+// prettier-ignore
+import { Methods as Methods0 } from '.'
+
+// prettier-ignore
+const api = <T>({ baseURL, fetch }: AspidaClient<T>) => {
+  const prefix = (baseURL === undefined ? '' : baseURL).replace(/\/$/, '')
+  const PATH0 = '/user'
+  const GET = 'GET'
+
+  return {
+    /**
+     * @returns sample
+     */
+    get: (option?: { config?: T }) =>
+      fetch<Methods0['get']['resBody'], BasicHeaders, Methods0['get']['status']>(prefix, PATH0, GET, option).json(),
+    /**
+     * @returns sample
+     */
+    $get: (option?: { config?: T }) =>
+      fetch<Methods0['get']['resBody'], BasicHeaders, Methods0['get']['status']>(prefix, PATH0, GET, option).json().then(r => r.body),
+    $path: () => `${prefix}${PATH0}`
+  }
+}
+
+// prettier-ignore
+export type ApiInstance = ReturnType<typeof api>
+// prettier-ignore
+export default api
diff --git a/samples/array-one-of/user/index.ts b/samples/array-one-of/user/index.ts
new file mode 100644
index 00000000..64edb78d
--- /dev/null
+++ b/samples/array-one-of/user/index.ts
@@ -0,0 +1,13 @@
+/* eslint-disable */
+import type * as Types from '../@types'
+
+export type Methods = {
+  get: {
+    status: 200
+
+    /** sample */
+    resBody: {
+      user: Partial<Types.User> | null
+    }
+  }
+}
diff --git a/src/buildV3.ts b/src/buildV3.ts
index 22023e74..a701a0f8 100644
--- a/src/buildV3.ts
+++ b/src/buildV3.ts
@@ -370,7 +370,7 @@ export default (openapi: OpenAPIV3.Document) => {
         ]
           .map(p => `\n${description2Doc(p.description, '')}export type ${p.name} = ${p.text}\n`)
           .join('')
-          .replace(/ Types\./g, ' ')
+          .replace(/(\W)Types\./g, '$1')
       : null
 
   return {