diff -r 953d8ec1aeb3 Objects/unicodeobject.c
--- a/Objects/unicodeobject.c	Sat Dec 14 21:07:51 2013 +0200
+++ b/Objects/unicodeobject.c	Sun Dec 15 13:27:21 2013 +0800
@@ -2613,6 +2613,12 @@
         break;
     }
 
+    case 'T':
+    {
+        /* %.400s */
+        precision = 400;
+        width = 0;
+    }
     case 's':
     {
         /* UTF-8 */