diff --git a/app/assets/stylesheets/common/base/topic-post.scss b/app/assets/stylesheets/common/base/topic-post.scss
index 95461d8ca55..a45cac4c0b0 100644
--- a/app/assets/stylesheets/common/base/topic-post.scss
+++ b/app/assets/stylesheets/common/base/topic-post.scss
@@ -282,6 +282,7 @@ table.md-table {
     font-weight: bold;
     font-size: 0.9em;
     color: lighten($primary, 50%);
+    width: 100%;
 
     .custom-message {
       text-transform: none;