diff --git a/res/css/views/rooms/_EventTile.scss b/res/css/views/rooms/_EventTile.scss
index ce2bf9c8a4..67c8b8b2d8 100644
--- a/res/css/views/rooms/_EventTile.scss
+++ b/res/css/views/rooms/_EventTile.scss
@@ -443,6 +443,7 @@ limitations under the License.
 .mx_EventTile_content .markdown-body h2
 {
     font-size: 1.5em;
+    border-bottom: none ! important; // override GFM
 }
 
 .mx_EventTile_content .markdown-body a {