diff --git a/_src/entrypoints/bs3-polyfill.scss b/_src/entrypoints/bs3-polyfill.scss
index 9fcd6ea..dbaa849 100644
--- a/_src/entrypoints/bs3-polyfill.scss
+++ b/_src/entrypoints/bs3-polyfill.scss
@@ -1,9 +1,16 @@
+@use "../styles/bootstrap_vars" as bs;
+@use "sass:map";
+
 $icon-font-path: "bootstrap-sass/assets/fonts/bootstrap/";
 $navbar-default-bg: transparent;
 $navbar-default-border: transparent;
 $navbar-padding-vertical: 0;
 $navbar-padding-horizontal: 0;
 
+$screen-sm-min: map-get(bs.$grid-breakpoints, "sm");
+$screen-md-min: map-get(bs.$grid-breakpoints, "md");
+$screen-lg-min: map-get(bs.$grid-breakpoints, "lg");
+
 html {
   @import "bootstrap-sass";
   .fade {