diff --git a/internal_packages/ui-darkside/styles/darkside.less b/internal_packages/ui-darkside/styles/darkside.less
index 7d866c5ae..a0a94d908 100644
--- a/internal_packages/ui-darkside/styles/darkside.less
+++ b/internal_packages/ui-darkside/styles/darkside.less
@@ -525,7 +525,8 @@ body.is-blurred .list-tabular .list-tabular-item.keyboard-cursor {
 #message-list .message-subject-wrap,
 #message-list .message-item-wrap,
 #message-list .footer-reply-area-wrap,
-#message-list .minified-bundle .msg-lines {
+#message-list .minified-bundle .msg-lines,
+#message-list .message-list-headers {
   max-width: @message-width;
 }