diff --git a/_sass/minima-dark/skins/special.scss b/_sass/minima-dark/skins/special.scss
index 8d1d456..b99eee2 100644
--- a/_sass/minima-dark/skins/special.scss
+++ b/_sass/minima-dark/skins/special.scss
@@ -28,6 +28,7 @@ $table-header-bg-color: lighten($background-color, 10%) !default;
 $table-header-border:   lighten($background-color, 21%) !default;
 $table-border-color:    $border-color-01 !default;
 
+$on-small: 735px !default;
 
 // Syntax highlighting styles should be adjusted appropriately for every "skin"
 // List of tokens: https://github.com/rouge-ruby/rouge/wiki/List-of-tokens