diff --git a/packages/primevue/src/button/Button.d.ts b/packages/primevue/src/button/Button.d.ts
index 05decaee4..a67e4495b 100755
--- a/packages/primevue/src/button/Button.d.ts
+++ b/packages/primevue/src/button/Button.d.ts
@@ -180,6 +180,7 @@ export interface ButtonProps extends ButtonHTMLAttributes {
     /**
      * Add a plain textual class to the button without a background initially.
      * @defaultValue false
+     * @deprecated since v4.2.0. Use a contrast severity instead.
      */
     plain?: boolean | undefined;
     /**