diff --git a/app/assets/javascripts/discourse/views/poster_expansion_view.js b/app/assets/javascripts/discourse/views/poster_expansion_view.js
index dffcbbf38b6..62c175246fe 100644
--- a/app/assets/javascripts/discourse/views/poster_expansion_view.js
+++ b/app/assets/javascripts/discourse/views/poster_expansion_view.js
@@ -27,12 +27,6 @@ Discourse.PosterExpansionView = Discourse.View.extend({
           position.left += $avatar.width() + 5;
           div.css(position);
         }
-
-        var maxWidth = div.width();
-        if (maxWidth < 250) {
-          maxWidth = 250;
-        }
-        div.css({ maxWidth: maxWidth });
       }
     });
 
diff --git a/app/assets/stylesheets/desktop/poster_expansion.scss b/app/assets/stylesheets/desktop/poster_expansion.scss
index 7d0061e993e..516a43f986d 100644
--- a/app/assets/stylesheets/desktop/poster_expansion.scss
+++ b/app/assets/stylesheets/desktop/poster_expansion.scss
@@ -5,6 +5,7 @@
 
 #poster-expansion {
   position: absolute;
+  width: 460px;
   left: 20px;
   z-index: 990;
   box-shadow: 0 2px 6px $primary_border_color;