diff --git a/sass/_config/_variables.scss b/sass/_config/_variables.scss
index e98fc39..f495d34 100644
--- a/sass/_config/_variables.scss
+++ b/sass/_config/_variables.scss
@@ -82,6 +82,9 @@ $hyphens: false !default;
 // Number of grid-columns
 $cols: 12 !default;
 
+// Gutter
+$gutter: null;
+
 // Grid gutters (for .has-gutter-* classes)
 $grid-gutters: (
   '': 1rem,
diff --git a/sass/_library/_utilities.scss b/sass/_library/_utilities.scss
index ba6bc77..4efb22d 100644
--- a/sass/_library/_utilities.scss
+++ b/sass/_library/_utilities.scss
@@ -112,7 +112,7 @@
 
 /* simple blocks alignment */
 
-.left
+.left,
 .u-left {
   margin-right: auto;
 }