diff --git a/src/app/components/dropdown/dropdown.ts b/src/app/components/dropdown/dropdown.ts
index 2f5bbc74f22..59e8fc63e2b 100755
--- a/src/app/components/dropdown/dropdown.ts
+++ b/src/app/components/dropdown/dropdown.ts
@@ -479,6 +479,7 @@ export class Dropdown implements OnInit, AfterViewInit, AfterContentInit, AfterV
     @Input() autoDisplayFirst: boolean = true;
     /**
      * Whether to display options as grouped when nested options are provided.
+     * @deprecated since v17.3.0, set initial value by model instead.
      * @group Props
      */
     @Input() group: boolean | undefined;