diff --git a/packages/devextreme/js/ui/themes.d.ts b/packages/devextreme/js/ui/themes.d.ts
index c46877ba779a..85f47f7dcd2d 100644
--- a/packages/devextreme/js/ui/themes.d.ts
+++ b/packages/devextreme/js/ui/themes.d.ts
@@ -33,9 +33,6 @@ export default class themes {
      * @public
      */
     static initialized(callback: Function): void;
-    static isMaterial(theme: string): boolean;
-    static isFluent(theme: string): boolean;
-    static isMaterialBased(theme: string): boolean;
 }
 
 export function current(): string;
diff --git a/packages/devextreme/ts/dx.all.d.ts b/packages/devextreme/ts/dx.all.d.ts
index b14a33fcff52..eab193fdbea8 100644
--- a/packages/devextreme/ts/dx.all.d.ts
+++ b/packages/devextreme/ts/dx.all.d.ts
@@ -29817,9 +29817,6 @@ declare module DevExpress.ui {
      * [descr:ui.themes.initialized(callback)]
      */
     static initialized(callback: Function): void;
-    static isMaterial(theme: string): boolean;
-    static isFluent(theme: string): boolean;
-    static isMaterialBased(theme: string): boolean;
   }
   /**
    * [descr:Widget]