diff --git a/tailbone/templates/deform/select.pt b/tailbone/templates/deform/select.pt
index 60c283de..5bae0ecb 100644
--- a/tailbone/templates/deform/select.pt
+++ b/tailbone/templates/deform/select.pt
@@ -17,7 +17,7 @@
           class string: form-control ${css_class or ''};
           multiple multiple;
           size size;
-          style style;">
+          style style;" auto-enhance="true">
     <tal:loop tal:repeat="item values">
       <optgroup tal:condition="isinstance(item, optgroup_class)"
                 tal:attributes="label item.label">