diff --git a/app/assets/stylesheets/desktop/discourse.scss b/app/assets/stylesheets/desktop/discourse.scss
index aef62d3859c..154010f9652 100644
--- a/app/assets/stylesheets/desktop/discourse.scss
+++ b/app/assets/stylesheets/desktop/discourse.scss
@@ -184,6 +184,7 @@ input {
 }
 
 #main-outlet-wrapper {
+  width: 100%;
   display: grid;
   grid-template-areas: "content";
   grid-template-columns: 1fr;