diff --git a/addons/web_kanban/static/src/less/kanban_view.less b/addons/web_kanban/static/src/less/kanban_view.less
index c6f85fc3f7a..e246b7add54 100644
--- a/addons/web_kanban/static/src/less/kanban_view.less
+++ b/addons/web_kanban/static/src/less/kanban_view.less
@@ -136,7 +136,7 @@
             .o-flex(1, 1, @o-kanban-default-record-width);
             @media (max-width: @screen-xs-max) {
                 margin: 0 0 1px 0;
-                width: 100%;
+                .o-flex(1, 0, 100%);
                 box-shadow: none;
             }