diff --git a/types/react-select/index.d.ts b/types/react-select/index.d.ts
index 6d8bc6d8c7..3d48d36e2e 100644
--- a/types/react-select/index.d.ts
+++ b/types/react-select/index.d.ts
@@ -263,6 +263,10 @@ export interface ReactSelectProps<TValue = OptionValues> extends React.Props<Rea
      * CSS className for the outer element
      */
     className?: string;
+    /**
+     * Prefix prepended to element default className if no className is defined
+     */
+    classNamePrefix?: string;
     /**
      * title for the "clear" control when `multi` is true
      * @default "Clear all"