diff --git a/src/core/style/layout.scss b/src/core/style/layout.scss
index 920a9b05f3..eed7865916 100644
--- a/src/core/style/layout.scss
+++ b/src/core/style/layout.scss
@@ -69,6 +69,11 @@
     $offsetName: 'offset-#{$name}';
   }
 
+  [#{$flexName}] {
+    flex: 0 0 100%;
+    max-width: 100%;
+  }
+
   // (0-19) * 5 = 0-95%
   @for $i from 0 through 19 {
     [#{$flexName}="#{$i * 5}"] {