diff --git a/scss/elements/_sidenav.scss b/scss/elements/_sidenav.scss
index 7fa92cf6..6f94f6ca 100644
--- a/scss/elements/_sidenav.scss
+++ b/scss/elements/_sidenav.scss
@@ -31,7 +31,7 @@
       @include h4;
       background-color: $color-white;
       color: $color-primary;
-      box-shadow: inset .4rem 0 0 0 $color-primary;
+      box-shadow: inset ($gap / 2) 0 0 0 $color-primary;
 
       .sidenav__link-icon {
         @include icon-style-active;