diff --git a/db.class.php b/db.class.php
index f8e375e..7d3288d 100644
--- a/db.class.php
+++ b/db.class.php
@@ -473,8 +473,13 @@ class MeekroDB {
   protected function escape($str) { return "'" . $this->get()->real_escape_string(strval($str)) . "'"; }
   
   protected function sanitize($value) {
-    if (is_object($value) && ($value instanceof MeekroDBEval)) return $value->text;
-    else if (is_null($value)) return $this->usenull ? 'NULL' : "''";
+    if (is_object($value)) {
+      if ($value instanceof MeekroDBEval) return $value->text;
+      else if ($value instanceof DateTime) return $this->escape($value->format('Y-m-d H:i:s'));
+      else return '';
+    }
+    
+    if (is_null($value)) return $this->usenull ? 'NULL' : "''";
     else if (is_bool($value)) return ($value ? 1 : 0);
     else if (is_int($value)) return $value;
     else if (is_float($value)) return $value;
diff --git a/simpletest/BasicTest.php b/simpletest/BasicTest.php
index 9e4788e..ad153c3 100644
--- a/simpletest/BasicTest.php
+++ b/simpletest/BasicTest.php
@@ -142,7 +142,9 @@ class BasicTest extends SimpleTest {
   }
   
   function test_4_query() {
-    DB::query("UPDATE %b SET birthday=%t WHERE username=%s", 'accounts', new DateTime('10 September 2000 13:13:13'), 'Charlie\'s Friend');
+    DB::update('accounts', array(
+      'birthday' => new DateTime('10 September 2000 13:13:13')
+    ), 'username=%s', 'Charlie\'s Friend');
     
     $results = DB::query("SELECT * FROM accounts WHERE username=%s AND birthday IN %lt", 'Charlie\'s Friend', array('September 10 2000 13:13:13'));
     $this->assert(count($results) === 1);