diff --git a/compat/interfaces.ts b/compat/interfaces.ts
new file mode 100644
index 0000000000..2da3964881
--- /dev/null
+++ b/compat/interfaces.ts
@@ -0,0 +1 @@
+export { UnaryFunction, OperatorFunction, FactoryOrValue, MonoTypeOperatorFunction } from 'rxjs';
\ No newline at end of file