diff --git a/src/compiler/compile/index.ts b/src/compiler/compile/index.ts
index 63f9b5f610c4..30787f8d8863 100644
--- a/src/compiler/compile/index.ts
+++ b/src/compiler/compile/index.ts
@@ -6,7 +6,7 @@ import render_ssr from './render-ssr/index';
 import { CompileOptions, Warning } from '../interfaces';
 import Component from './Component';
 import fuzzymatch from '../utils/fuzzymatch';
-import { get_name_from_filename } from './utils/get_name_from_filename';
+import get_name_from_filename from './utils/get_name_from_filename';
 
 const valid_options = [
 	'format',
diff --git a/src/runtime/ambient.ts b/src/runtime/ambient.ts
new file mode 100644
index 000000000000..b094056c5959
--- /dev/null
+++ b/src/runtime/ambient.ts
@@ -0,0 +1,19 @@
+declare module '*.svelte' {
+	type Props = Record<string, any>;
+
+	export default class {
+		constructor(options: {
+			target: Element;
+			anchor?: Element;
+			props?: Props;
+			hydrate?: boolean;
+			intro?: boolean;
+		});
+
+		$set(props: Props): void;
+		$on<T = any>(event: string, callback: (event: CustomEvent<T>) => void): () => void;
+		$destroy(): void;
+
+		[accessor: string]: any;
+	}
+}
diff --git a/src/runtime/index.ts b/src/runtime/index.ts
index 40928da8a0eb..0973b93f1ee7 100644
--- a/src/runtime/index.ts
+++ b/src/runtime/index.ts
@@ -1,3 +1,5 @@
+import './ambient';
+
 export {
 	onMount,
 	onDestroy,