diff --git a/framework/core/less/common/scaffolding.less b/framework/core/less/common/scaffolding.less
index 5f4a9b562..facfa6f43 100644
--- a/framework/core/less/common/scaffolding.less
+++ b/framework/core/less/common/scaffolding.less
@@ -3,10 +3,10 @@
 :root {
   --flarum-screen: none;
 
-  @media @phone { --flarum-screen: phone }
-  @media @tablet { --flarum-screen: tablet }
-  @media @desktop { --flarum-screen: desktop }
-  @media @desktop-hd { --flarum-screen: desktop-hd }
+  @media @phone { --flarum-screen: phone; }
+  @media @tablet { --flarum-screen: tablet; }
+  @media @desktop { --flarum-screen: desktop; }
+  @media @desktop-hd { --flarum-screen: desktop-hd; }
 }
 
 * {