diff --git a/core/model/Database.php b/core/model/Database.php
index 0eabfede2..eeb55d4a4 100755
--- a/core/model/Database.php
+++ b/core/model/Database.php
@@ -546,6 +546,7 @@ abstract class Query extends Object implements Iterator {
 	 * @return array
 	 */
 	public function map() {
+		$column = array();
 		foreach($this as $record) {
 			$key = reset($record);
 			$val = next($record);