diff --git a/app/assets/stylesheets/desktop/topic-post.scss b/app/assets/stylesheets/desktop/topic-post.scss
index dfb19ab43c..bb00846e76 100644
--- a/app/assets/stylesheets/desktop/topic-post.scss
+++ b/app/assets/stylesheets/desktop/topic-post.scss
@@ -641,7 +641,7 @@ $topic-body-width: 690px;
 $topic-body-width-padding: 11px;
 $topic-avatar-width: 45px;
 .topic-body {
-  width: calc(#{$topic-body-width} + calc(#{$topic-body-width-padding} * 2));
+  width: calc(#{$topic-body-width} + (#{$topic-body-width-padding} * 2));
   float: left;
   position: relative;
   z-index: z("base");