diff --git a/src/utils/reactHelpers.d.ts b/src/utils/reactHelpers.d.ts
index da8f93a5e6a099..f0d00c923b941a 100644
--- a/src/utils/reactHelpers.d.ts
+++ b/src/utils/reactHelpers.d.ts
@@ -1,4 +1,9 @@
+import * as React from 'react';
+
 export function cloneChildrenWithClassName<T>(
   children: React.ReactNode,
   className: string
 ): T[];
+
+export function isMuiElement(element: any, muiNames: Array<string>): boolean;
+export function isMuiComponent(element: any, muiNames: Array<string>): boolean;