diff --git a/Doctrine/Type/NativeDateIntervalType.php b/Doctrine/Type/NativeDateIntervalType.php
index 12e8b789b..bc4938e97 100644
--- a/Doctrine/Type/NativeDateIntervalType.php
+++ b/Doctrine/Type/NativeDateIntervalType.php
@@ -74,13 +74,15 @@ class NativeDateIntervalType extends DateIntervalType
         if (is_numeric($current)) {
             $next = \next($strings);
             switch($next) {
-                case 'year': 
+                case 'year':
+                case 'years':
                     $unit = 'Y';
                     break;
                 case 'mon':
                 case 'mons': 
                     $unit = 'M';
                     break;
+                case 'day':
                 case 'days':
                     $unit = 'D';
                     break;