diff --git a/src/Styles/classNames.js b/src/Styles/classNames.js
index ed8b0436..0003c103 100644
--- a/src/Styles/classNames.js
+++ b/src/Styles/classNames.js
@@ -1,3 +1,3 @@
 const UI_MOD_OPERAND = 6;
 export const uiModClassName = (id) =>
-  Number.isNaN(id) ? null : `ui-mod ui-mod--${window.parseInt(id) % UI_MOD_OPERAND}`;
+  Number.isNaN(id) ? null : `ui-mod ui-mod--${parseInt(id) % UI_MOD_OPERAND}`;