diff --git a/.changeset/tender-pugs-hide.md b/.changeset/tender-pugs-hide.md
new file mode 100644
index 0000000000..260f49614e
--- /dev/null
+++ b/.changeset/tender-pugs-hide.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: provide proper public type for `parseCss` result
diff --git a/packages/svelte/src/compiler/index.js b/packages/svelte/src/compiler/index.js
index acfef6a320..e864c4a1f4 100644
--- a/packages/svelte/src/compiler/index.js
+++ b/packages/svelte/src/compiler/index.js
@@ -123,7 +123,7 @@ export function parse(source, { modern, loose } = {}) {
  * The parseCss function parses a CSS stylesheet, returning its abstract syntax tree.
  *
  * @param {string} source The CSS source code
- * @returns {Omit<AST.CSS.StyleSheet, 'attributes' | 'content'>}
+ * @returns {AST.CSS.StyleSheetFile}
  */
 export function parseCss(source) {
 	source = remove_bom(source);
@@ -135,7 +135,7 @@ export function parseCss(source) {
 	const children = parse_stylesheet(parser);
 
 	return {
-		type: 'StyleSheet',
+		type: 'StyleSheetFile',
 		start: 0,
 		end: source.length,
 		children
diff --git a/packages/svelte/src/compiler/types/css.d.ts b/packages/svelte/src/compiler/types/css.d.ts
index 154a06ffb1..13eb880d83 100644
--- a/packages/svelte/src/compiler/types/css.d.ts
+++ b/packages/svelte/src/compiler/types/css.d.ts
@@ -6,10 +6,17 @@ export namespace _CSS {
 		end: number;
 	}
 
-	export interface StyleSheet extends BaseNode {
+	export interface StyleSheetBase extends BaseNode {
+		children: Array<Atrule | Rule>;
+	}
+
+	export interface StyleSheetFile extends StyleSheetBase {
+		type: 'StyleSheetFile';
+	}
+
+	export interface StyleSheet extends StyleSheetBase {
 		type: 'StyleSheet';
 		attributes: any[]; // TODO
-		children: Array<Atrule | Rule>;
 		content: {
 			start: number;
 			end: number;
diff --git a/packages/svelte/tests/css-parse.test.ts b/packages/svelte/tests/css-parse.test.ts
index 4d8ef8601b..3a53e97955 100644
--- a/packages/svelte/tests/css-parse.test.ts
+++ b/packages/svelte/tests/css-parse.test.ts
@@ -4,7 +4,7 @@ import { parseCss } from 'svelte/compiler';
 describe('parseCss', () => {
 	it('parses a simple rule', () => {
 		const ast = parseCss('div { color: red; }');
-		assert.equal(ast.type, 'StyleSheet');
+		assert.equal(ast.type, 'StyleSheetFile');
 		assert.equal(ast.children.length, 1);
 		assert.equal(ast.children[0].type, 'Rule');
 	});
@@ -57,7 +57,7 @@ describe('parseCss', () => {
 
 	it('parses empty stylesheet', () => {
 		const ast = parseCss('');
-		assert.equal(ast.type, 'StyleSheet');
+		assert.equal(ast.type, 'StyleSheetFile');
 		assert.equal(ast.children.length, 0);
 		assert.equal(ast.start, 0);
 		assert.equal(ast.end, 0);
@@ -138,7 +138,7 @@ describe('parseCss', () => {
 
 	it('parses escaped characters', () => {
 		const ast = parseCss("div { background: url('./example.png?\\''); }");
-		assert.equal(ast.type, 'StyleSheet');
+		assert.equal(ast.type, 'StyleSheetFile');
 		assert.equal(ast.children.length, 1);
 		const rule = ast.children[0];
 		assert.equal(rule.type, 'Rule');
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 62c0e210be..e7aa5395b8 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -889,7 +889,7 @@ declare module 'svelte/compiler' {
 	 *
 	 * @param source The CSS source code
 	 * */
-	export function parseCss(source: string): Omit<AST.CSS.StyleSheet, "attributes" | "content">;
+	export function parseCss(source: string): AST.CSS.StyleSheetFile;
 	/**
 	 * @deprecated Replace this with `import { walk } from 'estree-walker'`
 	 * */
@@ -1673,10 +1673,17 @@ declare module 'svelte/compiler' {
 			end: number;
 		}
 
-		export interface StyleSheet extends BaseNode {
+		export interface StyleSheetBase extends BaseNode {
+			children: Array<Atrule | Rule>;
+		}
+
+		export interface StyleSheetFile extends StyleSheetBase {
+			type: 'StyleSheetFile';
+		}
+
+		export interface StyleSheet extends StyleSheetBase {
 			type: 'StyleSheet';
 			attributes: any[]; // TODO
-			children: Array<Atrule | Rule>;
 			content: {
 				start: number;
 				end: number;