diff --git a/agaric/css/agaric.css b/agaric/css/agaric.css
index 4ad1587..a482717 100644
--- a/agaric/css/agaric.css
+++ b/agaric/css/agaric.css
@@ -7299,7 +7299,7 @@ iframe {
   margin-left: auto;
   margin-right: auto; }
 
-.flow.content.comment-form {
+.media-comment > .flow.content {
   width: 100%; }
 
 @font-face {