diff --git a/scss/mixins/_grid.scss b/scss/mixins/_grid.scss
index b1240b01f15f..6998f584d5b5 100644
--- a/scss/mixins/_grid.scss
+++ b/scss/mixins/_grid.scss
@@ -22,6 +22,7 @@
 
 @mixin make-row($gutter: $grid-gutter-width) {
   display: flex;
+  flex: 1 0 100%;
   flex-wrap: wrap;
   margin-right: -$gutter / 2;
   margin-left: -$gutter / 2;