diff --git a/packages/@ember/polyfills/lib/merge.ts b/packages/@ember/polyfills/lib/merge.ts
index dc88e7d508a..d087eb82143 100644
--- a/packages/@ember/polyfills/lib/merge.ts
+++ b/packages/@ember/polyfills/lib/merge.ts
@@ -24,6 +24,7 @@ export default function merge<T, U>(original: T, updates: U): T & U;
   @param {Object} original The object to merge into
   @param {Object} updates The object to copy properties from
   @return {Object}
+  @deprecated
   @public
 */
 export default function merge(original: object, updates: object) {