diff --git a/packages/reffuse/src/ReffuseExtension.ts b/packages/reffuse/src/ReffuseExtension.ts
new file mode 100644
index 0000000..4dbe515
--- /dev/null
+++ b/packages/reffuse/src/ReffuseExtension.ts
@@ -0,0 +1 @@
+export const make = <R>() => undefined