diff --git a/api/@internal/component/ets/text_common.d.ts b/api/@internal/component/ets/text_common.d.ts
index 8452d5831a2d114e931618782cc98d6afbc53d9c..a1e1594ec697a59df1085789cee1f81179438c4c 100644
--- a/api/@internal/component/ets/text_common.d.ts
+++ b/api/@internal/component/ets/text_common.d.ts
@@ -1282,6 +1282,17 @@ interface DecorationStyleResult {
    * @since 12
    */
   style?: TextDecorationStyle;
+
+  /**
+   * The thicknessScale value of the decoration property object.
+   *
+   * @type { ?number }
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 20
+   */
+  thicknessScale?: number;
 }
 
 /**