diff --git a/scss/_root.scss b/scss/_root.scss
index 62ed0fd621..2bde6f7b6e 100644
--- a/scss/_root.scss
+++ b/scss/_root.scss
@@ -122,8 +122,6 @@
   --#{$prefix}form-control-disabled-bg: var(--#{$prefix}secondary-bg);
   // scss-docs-end form-control-vars
 
-  --#{$prefix}highlight-bg: #{$mark-bg};
-
   @each $name, $value in $grid-breakpoints {
     --#{$prefix}breakpoint-#{$name}: #{$value};
   }