diff --git a/packages/util/index.d.ts b/packages/util/index.d.ts
new file mode 100644
index 000000000..3e64df453
--- /dev/null
+++ b/packages/util/index.d.ts
@@ -0,0 +1,4 @@
+export function ensureSafeComponent(
+  component: unknown,
+  thingWithOwner: unknown
+): unknown;