diff --git a/MIGRATION.md b/MIGRATION.md
index 0799c6eb5b..06f63a2c9c 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -92,7 +92,7 @@ export interface ActionWithPayload<T> extends Action {
 And if you need an unsafe version to help with transition.
 
 ```ts
-export interface UnsafeAction implements Action {
+export interface UnsafeAction extends Action {
   payload?: any;
 }
 ```