diff --git a/e107_handlers/form_handler.php b/e107_handlers/form_handler.php
index 36596f876..4094c5df8 100644
--- a/e107_handlers/form_handler.php
+++ b/e107_handlers/form_handler.php
@@ -749,6 +749,11 @@ class e_form
 			// Load selectize behavior.
 			e107::js('core', 'selectize/js/selectize.init.js', 'jquery');
 
+			$options['selectize']['wrapperClass'] = 'selectize-control';
+			$options['selectize']['inputClass'] = 'selectize-input';
+			$options['selectize']['dropdownClass'] = 'selectize-dropdown';
+			$options['selectize']['dropdownContentClass'] = 'selectize-dropdown-content';
+
 			$jsSettings = array(
 				'id'      => vartrue($options['id'], $this->name2id($name)),
 				'options' => $options['selectize'],
diff --git a/e107_web/js/selectize/js/selectize.init.js b/e107_web/js/selectize/js/selectize.init.js
index e0079dee4..20b9b49ed 100644
--- a/e107_web/js/selectize/js/selectize.init.js
+++ b/e107_web/js/selectize/js/selectize.init.js
@@ -98,6 +98,11 @@ var e107 = e107 || {'settings': {}, 'behaviors': {}};
                             labelField: item.options.labelField ? item.options.labelField : 'label',
                             searchField: item.options.searchField ? item.options.searchField : 'label',
 
+                            wrapperClass: item.options.wrapperClass || 'selectize-control',
+                            inputClass: item.options.inputClass || 'selectize-input',
+                            dropdownClass: item.options.dropdownClass || 'selectize-dropdown',
+                            dropdownContentClass: item.options.dropdownContentClass || 'selectize-dropdown-content',
+
                             // Callbacks.
                             load: function (query, callback) {
                                 var loadPath = item.options.loadPath ? item.options.loadPath : '';