diff --git a/source/php/Module/views/open-street-map.blade.php b/source/php/Module/views/open-street-map.blade.php
index 161c05a..f901df8 100644
--- a/source/php/Module/views/open-street-map.blade.php
+++ b/source/php/Module/views/open-street-map.blade.php
@@ -24,6 +24,7 @@
         @endif
         @collection([
             'id' => 'osm-posts-container-' . $ID,
+            'classList' => ['o-grid', 'o-grid--horizontal'],
             'attributeList' => [
                 'data-js-osm-endpoint-posts' => '',
                 'data-js-filter-select-container' => 'osm-filter-container-' . $ID,