diff --git a/scss/_variables.scss b/scss/_variables.scss
index d1e301f8fe..f0fb88dafd 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -53,7 +53,7 @@ $spacer:                     1rem !default;
 $spacer-x:                   $spacer !default;
 $spacer-y:                   $spacer !default;
 
-$border-width:               .0625rem !default;
+$border-width:               (1 / $font-size-root)rem !default;
 
 
 // Typography