diff --git a/polaris-react/src/components/ButtonGroup/components/Item/Item.tsx b/polaris-react/src/components/ButtonGroup/components/Item/Item.tsx
index 3f6991cae8c..614911a91f6 100644
--- a/polaris-react/src/components/ButtonGroup/components/Item/Item.tsx
+++ b/polaris-react/src/components/ButtonGroup/components/Item/Item.tsx
@@ -18,7 +18,7 @@ export function Item({button}: ItemProps) {
   const className = classNames(
     styles.Item,
     focused && styles['Item-focused'],
-    button.props.plain && styles['Item-plain'],
+    button.props.variant === 'plain' && styles['Item-plain'],
   );
 
   return (