diff --git a/src/admin/scss/app.scss b/src/admin/scss/app.scss
index ebdf23015f..1d48f0b858 100644
--- a/src/admin/scss/app.scss
+++ b/src/admin/scss/app.scss
@@ -34,7 +34,7 @@
 
   @include mid-break {
     --gutter-h: #{base(2)};
-    --nav-width: 0;
+    --nav-width: 0px;
   }
 
   @include small-break {