diff --git a/packages/govuk-elements-sass/public/sass/elements/forms/_form-multiple-choice.scss b/packages/govuk-elements-sass/public/sass/elements/forms/_form-multiple-choice.scss
index effeb8eb6..71ed39fee 100644
--- a/packages/govuk-elements-sass/public/sass/elements/forms/_form-multiple-choice.scss
+++ b/packages/govuk-elements-sass/public/sass/elements/forms/_form-multiple-choice.scss
@@ -87,6 +87,7 @@
     content: "";
     border: solid;
     border-width: 0 0 5px 5px;
+    border-top-color: transparent;
     background: transparent;
     width: 17px;
     height: 7px;