diff --git a/site/posts/2020-02-18-simple-swift-promises.md b/site/posts/2020-02-18-simple-swift-promises.md
index b10267b..6340e36 100644
--- a/site/posts/2020-02-18-simple-swift-promises.md
+++ b/site/posts/2020-02-18-simple-swift-promises.md
@@ -178,7 +178,7 @@ public extension Promise {
 		addHandler { (parentResult) in
 			let newPromise = mapper(parentResult)
 			newPromise.addHandler(next.resolve)
-			newPromise.addHandler(next.reject)
+			newPromise.addCatcher(next.reject)
 		}
 		addCatcher(next.reject)
 		return next