diff --git a/js/sql.js b/js/sql.js
index 993b620f4..e5daf03d7 100644
--- a/js/sql.js
+++ b/js/sql.js
@@ -476,7 +476,7 @@ $(document).ready(function() {
                 // if 'chechbox_null_<field_name>_<row_index>' is clicked empty the corresponding select/editor.
                 $('.checkbox_null_' + field_name + '_' + this_row_index).bind('click', function(e) {
                     if ($this_field.is('.enum, .set')) {
-                        $this_field.find('select').selectedIndex = -1;
+                        $this_field.find('select').attr('value', '');
                     } else if ($this_field.is('.relation')) {
                         // if the dropdown is there to select the foreign value
                         if ($this_field.find('select').length > 0) {
diff --git a/sql.php b/sql.php
index 7dbfe9ead..42dff07f8 100644
--- a/sql.php
+++ b/sql.php
@@ -100,7 +100,7 @@ if(isset($_REQUEST['get_enum_values']) && $_REQUEST['get_enum_values'] == true)
 
     $values = explode(',', str_replace($search, '', $field_info_result[0]['Type']));
 
-    $dropdown = '';
+    $dropdown = '<option value="">&nbsp;</option>';
     foreach($values as $value) {
         $dropdown .= '<option value="' . htmlspecialchars($value) . '"';
         if($value == $_REQUEST['curr_value']) {