diff --git a/app/design/frontend/Magento/luma/Magento_Bundle/web/css/source/_module.less b/app/design/frontend/Magento/luma/Magento_Bundle/web/css/source/_module.less
index 43ae23bab7895..eeb17653c877b 100644
--- a/app/design/frontend/Magento/luma/Magento_Bundle/web/css/source/_module.less
+++ b/app/design/frontend/Magento/luma/Magento_Bundle/web/css/source/_module.less
@@ -253,7 +253,7 @@
             .box-tocart {
                 .action.primary {
                     margin-right: 1%;
-                    width: 49%;
+                    width: auto;
                 }
             }