diff --git a/src/skins/vector/css/matrix-react-sdk/views/rooms/_EventTile.scss b/src/skins/vector/css/matrix-react-sdk/views/rooms/_EventTile.scss
index a980d1f9..7d8e4ba2 100644
--- a/src/skins/vector/css/matrix-react-sdk/views/rooms/_EventTile.scss
+++ b/src/skins/vector/css/matrix-react-sdk/views/rooms/_EventTile.scss
@@ -345,6 +345,11 @@ limitations under the License.
 }
 .mx_EventTile_body pre {
     position: relative;
+    border: 1px solid transparent;
+}
+.mx_EventTile:hover .mx_EventTile_body pre
+{
+    border: 1px solid $primary-hairline-color;
 }
 .mx_EventTile_body pre:hover .mx_EventTile_copyButton
 {