diff --git a/theme/boost/scss/moodle/core.scss b/theme/boost/scss/moodle/core.scss
index b93e086b128..45f4e5a961e 100644
--- a/theme/boost/scss/moodle/core.scss
+++ b/theme/boost/scss/moodle/core.scss
@@ -294,6 +294,7 @@ form.popupform div {
 // Accessibility: text 'seen' by screen readers but not visual users.
 .accesshide {
     position: absolute;
+    /*rtl:ignore*/
     left: -10000px;
     font-weight: normal;
     font-size: 1em;