diff --git a/.changeset/kind-donuts-boil.md b/.changeset/kind-donuts-boil.md
new file mode 100644
index 00000000..fdd02e35
--- /dev/null
+++ b/.changeset/kind-donuts-boil.md
@@ -0,0 +1,5 @@
+---
+'@hono/zod-openapi': patch
+---
+
+fix: base path not included in client types
diff --git a/packages/zod-openapi/src/index.ts b/packages/zod-openapi/src/index.ts
index 71166b9b..1e4cc3f2 100644
--- a/packages/zod-openapi/src/index.ts
+++ b/packages/zod-openapi/src/index.ts
@@ -250,7 +250,7 @@ export class OpenAPIHono<
         : HandlerAllResponse<OutputType<R>>
     >,
     hook: Hook<I, E, P, OutputType<R>> | undefined = this.defaultHook
-  ): OpenAPIHono<E, S & ToSchema<R['method'], P, I['in'], OutputType<R>>, BasePath> => {
+  ): OpenAPIHono<E, S & ToSchema<R['method'], MergePath<BasePath, P>, I['in'], OutputType<R>>, BasePath> => {
     this.openAPIRegistry.registerPath(route)
 
     const validators: MiddlewareHandler[] = []
diff --git a/packages/zod-openapi/test/index.test-d.ts b/packages/zod-openapi/test/index.test-d.ts
index ed8c20e8..03051e3a 100644
--- a/packages/zod-openapi/test/index.test-d.ts
+++ b/packages/zod-openapi/test/index.test-d.ts
@@ -44,7 +44,7 @@ describe('Types', () => {
   const appRoutes = app.openapi(route, (c) => {
     const data = c.req.valid('json')
     assertType<number>(data.id)
-    return c.jsonT({
+    return c.json({
       id: data.id,
       message: 'Success',
     })
@@ -70,7 +70,7 @@ describe('Types', () => {
       '/'
     >
     expectTypeOf(appRoutes).toMatchTypeOf<H>()
-  })
+  });
 })
 
 describe('Input types', () => {
diff --git a/packages/zod-openapi/test/index.test.ts b/packages/zod-openapi/test/index.test.ts
index 8ce78fa0..8a86d897 100644
--- a/packages/zod-openapi/test/index.test.ts
+++ b/packages/zod-openapi/test/index.test.ts
@@ -832,6 +832,16 @@ describe('basePath()', () => {
     expect(app.defaultHook).toBeDefined()
     expect(app.defaultHook).toBe(defaultHook)
   })
+
+  it('Should include base path in typings', () => {
+    const routes = new OpenAPIHono()
+      .basePath('/api')
+      .openapi(route, (c) => c.json({ message: 'Hello' }))
+
+    const client = hc<typeof routes>('http://localhost/')
+
+    expect(client.api.message.$url().pathname).toBe('/api/message')
+  })
 })
 
 describe('With hc', () => {