diff --git a/.changeset/hot-pumas-attack.md b/.changeset/hot-pumas-attack.md
new file mode 100644
index 0000000000..3dc33cbc10
--- /dev/null
+++ b/.changeset/hot-pumas-attack.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/rss': patch
+---
+
+Revert incorrect Content-Type header applied for RSS XML file
diff --git a/packages/astro-rss/src/index.ts b/packages/astro-rss/src/index.ts
index 23984f9fbd..33a8f66a02 100644
--- a/packages/astro-rss/src/index.ts
+++ b/packages/astro-rss/src/index.ts
@@ -89,7 +89,7 @@ export default async function getRssResponse(rssOptions: RSSOptions): Promise<Re
 	const rssString = await getRssString(rssOptions);
 	return new Response(rssString, {
 		headers: {
-			'Content-Type': 'application/rss+xml; charset=utf-8',
+			'Content-Type': 'application/xml',
 		},
 	});
 }
diff --git a/packages/astro-rss/test/rss.test.js b/packages/astro-rss/test/rss.test.js
index f1d69dbe97..8014f87fe9 100644
--- a/packages/astro-rss/test/rss.test.js
+++ b/packages/astro-rss/test/rss.test.js
@@ -62,7 +62,7 @@ describe('rss', () => {
 		assertXmlDeepEqual(str, validXmlResult);
 
 		const contentType = response.headers.get('Content-Type');
-		assert.equal(contentType, 'application/rss+xml; charset=utf-8');
+		assert.equal(contentType, 'application/xml');
 	});
 
 	it('should be the same string as getRssString', async () => {