diff --git a/.changeset/pink-beans-cross.md b/.changeset/pink-beans-cross.md
new file mode 100644
index 0000000000..c56c41b28c
--- /dev/null
+++ b/.changeset/pink-beans-cross.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix slashes for paths containing non-ASCII characters on Windows
diff --git a/packages/astro/src/core/util.ts b/packages/astro/src/core/util.ts
index 17fbc41a69..07b087493d 100644
--- a/packages/astro/src/core/util.ts
+++ b/packages/astro/src/core/util.ts
@@ -126,7 +126,7 @@ export function resolveDependency(dep: string, projectRoot: URL) {
  *   Windows:    C:/Users/astro/code/my-project/src/pages/index.astro
  */
 export function viteID(filePath: URL): string {
-	return slash(fileURLToPath(filePath) + filePath.search);
+	return slash(fileURLToPath(filePath) + filePath.search).replace(/\\/g, '/');
 }
 
 export const VALID_ID_PREFIX = `/@id/`;
diff --git a/packages/astro/test/fixtures/non-ascii-path/测试/package.json b/packages/astro/test/fixtures/non-ascii-path/测试/package.json
new file mode 100644
index 0000000000..0c38763be0
--- /dev/null
+++ b/packages/astro/test/fixtures/non-ascii-path/测试/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "@test/non-ascii-path",
+  "version": "0.0.0",
+  "private": true,
+  "dependencies": {
+    "astro": "workspace:*"
+  }
+}
diff --git a/packages/astro/test/fixtures/non-ascii-path/测试/src/pages/index.astro b/packages/astro/test/fixtures/non-ascii-path/测试/src/pages/index.astro
new file mode 100644
index 0000000000..57b148ac22
--- /dev/null
+++ b/packages/astro/test/fixtures/non-ascii-path/测试/src/pages/index.astro
@@ -0,0 +1 @@
+<h1>测试 OK</h1>
\ No newline at end of file
diff --git a/packages/astro/test/non-ascii-path.test.js b/packages/astro/test/non-ascii-path.test.js
new file mode 100644
index 0000000000..5fb947e9e0
--- /dev/null
+++ b/packages/astro/test/non-ascii-path.test.js
@@ -0,0 +1,21 @@
+import { expect } from 'chai';
+import * as cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Non-ASCII Path Test', () => {
+	let fixture;
+
+	before(async () => {
+		fixture = await loadFixture({ root: './fixtures/non-ascii-path/测试/' });
+		await fixture.build();
+	});
+
+	describe('build', () => {
+		it('Can load page', async () => {
+			const html = await fixture.readFile(`/index.html`);
+			const $ = cheerio.load(html);
+
+			expect($('h1').text()).to.equal('测试 OK');
+		});
+	});
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ace0a72086..4b516d159e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1698,6 +1698,12 @@ importers:
   packages/astro/test/fixtures/multiple-renderers/renderers/two:
     specifiers: {}
 
+  packages/astro/test/fixtures/non-ascii-path/测试:
+    specifiers:
+      astro: workspace:*
+    dependencies:
+      astro: link:../../../..
+
   packages/astro/test/fixtures/non-html-pages:
     specifiers:
       astro: workspace:*