diff --git a/plugins/chat/assets/stylesheets/common/chat-message.scss b/plugins/chat/assets/stylesheets/common/chat-message.scss
index 62f20b46237..f201b0ac470 100644
--- a/plugins/chat/assets/stylesheets/common/chat-message.scss
+++ b/plugins/chat/assets/stylesheets/common/chat-message.scss
@@ -144,7 +144,8 @@
       text-decoration: none;
     }
 
-    img.ytp-thumbnail-image {
+    img.ytp-thumbnail-image,
+    img.youtube-thumbnail {
       height: 100%;
       max-height: unset;