diff --git a/polygerrit-ui/app/elements/change/gr-message/gr-message.html b/polygerrit-ui/app/elements/change/gr-message/gr-message.html
index b828327..a0f6fbe 100644
--- a/polygerrit-ui/app/elements/change/gr-message/gr-message.html
+++ b/polygerrit-ui/app/elements/change/gr-message/gr-message.html
@@ -37,6 +37,7 @@
         display: block;
         position: relative;
         cursor: pointer;
+        overflow-y: hidden;
       }
       :host(.expanded) {
         cursor: auto;