diff --git a/adminer/include/editing.inc.php b/adminer/include/editing.inc.php
index 04076640..0f810403 100644
--- a/adminer/include/editing.inc.php
+++ b/adminer/include/editing.inc.php
@@ -139,7 +139,14 @@ function textarea($name, $value, $rows = 10, $cols = 80) {
 function edit_type($key, $field, $collations, $foreign_keys = array()) {
 	global $structured_types, $types, $unsigned, $on_actions;
 	?>
-<td><select name="<?php echo $key; ?>[type]" class="type" onfocus="lastType = selectValue(this);" onchange="editingTypeChange(this);"<?php echo on_help("getTarget(event).value", 1); ?>><?php echo optionlist((!$field["type"] || isset($types[$field["type"]]) ? array() : array($field["type"])) + $structured_types + ($foreign_keys ? array(lang('Foreign keys') => $foreign_keys) : array()), $field["type"]); ?></select>
+<td><select name="<?php echo $key; ?>[type]" class="type" onfocus="lastType = selectValue(this);" onchange="editingTypeChange(this);"<?php echo on_help("getTarget(event).value", 1); ?>><?php
+echo optionlist(
+	(!$field["type"] || isset($types[$field["type"]]) || isset($foreign_keys[$field["type"]]) ? array() : array($field["type"]))
+		+ $structured_types
+		+ ($foreign_keys ? array(lang('Foreign keys') => $foreign_keys) : array())
+	, $field["type"]
+);
+?></select>
 <td><input name="<?php echo $key; ?>[length]" value="<?php echo h($field["length"]); ?>" size="3" onfocus="editingLengthFocus(this);"<?php echo (!$field["length"] && preg_match('~var(char|binary)$~', $field["type"]) ? " class='required'" : ""); ?> onchange="editingLengthChange(this);" onkeyup="this.onchange();"><td class="options"><?php //! type="number" with enabled JavaScript
 	echo "<select name='$key" . "[collation]'" . (preg_match('~(char|text|enum|set)$~', $field["type"]) ? "" : " class='hidden'") . '><option value="">(' . lang('collation') . ')' . optionlist($collations, $field["collation"]) . '</select>';
 	echo ($unsigned ? "<select name='$key" . "[unsigned]'" . (!$field["type"] || preg_match('~((^|[^o])int|float|double|decimal)$~', $field["type"]) ? "" : " class='hidden'") . '><option>' . optionlist($unsigned, $field["unsigned"]) . '</select>' : '');