diff --git a/src/app.d.ts b/src/app.d.ts
new file mode 100644
index 0000000..dd7d358
--- /dev/null
+++ b/src/app.d.ts
@@ -0,0 +1,15 @@
+/// <reference types="@sveltejs/kit" />
+
+// See https://kit.svelte.dev/docs#typescript
+// for information about these interfaces
+declare namespace App {
+	interface Locals {
+		userid: string;
+	}
+
+	interface Platform {}
+
+	interface Session {}
+
+	interface Stuff {}
+}