diff --git a/scss/_variables.scss b/scss/_variables.scss
index d8877994a6..f0d3f005c4 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -37,7 +37,7 @@ $link-hover-decoration:      underline !default;
 //
 // Quickly modify global styling by enabling or disabling features.
 
-$enable-flex:                true !default;
+$enable-flex:                false !default;
 $enable-rounded:             true !default;
 $enable-shadows:             false !default;
 $enable-gradients:           false !default;