diff --git a/js/ui/box.d.ts b/js/ui/box.d.ts
index fba0a840f99e..ec4ba2fd3ca0 100644
--- a/js/ui/box.d.ts
+++ b/js/ui/box.d.ts
@@ -164,7 +164,7 @@ export interface dxBoxItem<TKey = any> extends CollectionWidgetItem {
      * @default 0
      * @public
      */
-    baseSize?: number | Mode;
+    baseSize?: number | string;
     /**
      * @docid
      * @default undefined
diff --git a/js/ui/responsive_box.d.ts b/js/ui/responsive_box.d.ts
index bfa323338bb0..97242b6cf4e2 100644
--- a/js/ui/responsive_box.d.ts
+++ b/js/ui/responsive_box.d.ts
@@ -106,7 +106,7 @@ export interface dxResponsiveBoxOptions<
        * @docid
        * @default 0
        */
-      baseSize?: number | Mode;
+      baseSize?: number | string;
       /**
        * @docid
        * @default 1
@@ -152,7 +152,7 @@ export interface dxResponsiveBoxOptions<
        * @docid
        * @default 0
        */
-      baseSize?: number | Mode;
+      baseSize?: number | string;
       /**
        * @docid
        * @default 1
diff --git a/ts/dx.all.d.ts b/ts/dx.all.d.ts
index 3aa69dd83431..19f382b59843 100644
--- a/ts/dx.all.d.ts
+++ b/ts/dx.all.d.ts
@@ -8947,7 +8947,7 @@ declare module DevExpress.ui {
     /**
      * [descr:dxBoxItem.baseSize]
      */
-    baseSize?: number | DevExpress.common.Mode;
+    baseSize?: number | string;
     /**
      * [descr:dxBoxItem.box]
      */
@@ -23346,7 +23346,7 @@ declare module DevExpress.ui {
       /**
        * [descr:dxResponsiveBoxOptions.cols.baseSize]
        */
-      baseSize?: number | DevExpress.common.Mode;
+      baseSize?: number | string;
       /**
        * [descr:dxResponsiveBoxOptions.cols.ratio]
        */
@@ -23379,7 +23379,7 @@ declare module DevExpress.ui {
       /**
        * [descr:dxResponsiveBoxOptions.rows.baseSize]
        */
-      baseSize?: number | DevExpress.common.Mode;
+      baseSize?: number | string;
       /**
        * [descr:dxResponsiveBoxOptions.rows.ratio]
        */