diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 6abf7788c..5450db321 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -597,6 +597,10 @@ ul.projects li {list-style-type:none;}
 
 #notified-projects>ul, #tracker_project_ids>ul, #custom_field_project_ids>ul {max-height:250px; overflow-y:auto;}
 
+ul.subprojects {list-style: none; display: inline;}
+ul.subprojects li {float: left;}
+ul.subprojects li:not(:last-child)::after {content: ', '; white-space: pre; white-space: pre;}
+
 #related-issues li img {vertical-align:middle;}
 
 ul.properties {padding:0; font-size: 0.9em; color: #777;}