diff --git a/app/assets/stylesheets/application.css b/app/assets/stylesheets/application.css
index 37713c984..ad4b597c2 100644
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@@ -1822,6 +1822,22 @@ td.gantt_selected_column .gantt_hdr,.gantt_selected_column_container {
   width: 49px;
 }
 
+td.gantt_watcher_users_column div.issue_watcher_users ul {
+  margin: 0;
+  padding: 0;
+  list-style: none;
+  display: inline-block;
+}
+
+td.gantt_watcher_users_column div.issue_watcher_users ul li {
+  float: left;
+}
+
+td.gantt_watcher_users_column div.issue_watcher_users ul li:not(:last-child)::after {
+  content: ', ';
+  white-space: pre;
+}
+
 .task {
   position: absolute;
   height:8px;