diff --git a/tools/migrate_datetime.php b/tools/migrate_datetime.php
new file mode 100644
index 00000000..25a90390
--- /dev/null
+++ b/tools/migrate_datetime.php
@@ -0,0 +1,14 @@
+<?php
+require dirname(__FILE__) . '/inc/cli.php';
+
+# edited_at column was using DATETIME when time column uses INT(11). This script solves that.
+
+$boards = listBoards(TRUE);
+#$boards = array('test2');
+
+foreach ($boards as $i => $b) {
+	query(sprintf('ALTER TABLE ``posts_%s`` ADD COLUMN edited_at_temp INT(11) DEFAULT NULL AFTER edited_at', $b));
+	query(sprintf('UPDATE ``posts_%s`` SET edited_at_temp = IF(edited_at IS NOT NULL, UNIX_TIMESTAMP(edited_at), NULL)', $b));
+	query(sprintf('ALTER TABLE ``posts_%s`` DROP COLUMN edited_at', $b));
+	query(sprintf('ALTER TABLE ``posts_%s`` CHANGE edited_at_temp edited_at INT(11) DEFAULT NULL', $b));
+}