diff --git a/vendor/assets/stylesheets/bootstrap/_variables.scss b/vendor/assets/stylesheets/bootstrap/_variables.scss
index 7bc1c94b..3e4faf55 100644
--- a/vendor/assets/stylesheets/bootstrap/_variables.scss
+++ b/vendor/assets/stylesheets/bootstrap/_variables.scss
@@ -96,7 +96,7 @@ $infoBorder:              darken(adjust-hue($infoBackground, -10), 7%) !default;
 $gridColumns:             12 !default;
 $gridColumnWidth:         60px !default;
 $gridGutterWidth:         20px !default;
-$gridRowWidth:            ($gridColumns * $gridColumnWidth) + ($gridGutterWidth * ($gridColumns - 1));
+$gridRowWidth:            ($gridColumns * $gridColumnWidth) + ($gridGutterWidth * ($gridColumns - 1)) !default;
 
 // Fluid grid
 $fluidGridColumnWidth:    6.382978723% !default;