diff --git a/wagtail/wagtailadmin/templates/wagtailadmin/pages/create.html b/wagtail/wagtailadmin/templates/wagtailadmin/pages/create.html
index 237219940..b87af8fae 100644
--- a/wagtail/wagtailadmin/templates/wagtailadmin/pages/create.html
+++ b/wagtail/wagtailadmin/templates/wagtailadmin/pages/create.html
@@ -40,7 +40,7 @@
                 <li class="actions preview">
                     {% trans 'Preview' as preview_label %}
                     {% if display_modes|length > 1 %}
-                        <div class="dropdown dropup button match-width">
+                        <div class="dropdown dropup dropdown-button match-width">
                             {% include "wagtailadmin/pages/_preview_button_on_create.html" with label=preview_label icon=1 %}
                             <div class="dropdown-toggle icon icon-arrow-up"></div>
                             <ul role="menu">