diff --git a/src/ZODB/utils.py b/src/ZODB/utils.py
index f487af30bf4b92ca2fe98e00ce3b8a023f12bc4c..79ed8338c73cb9b0202be305a770142c68709336 100644
--- a/src/ZODB/utils.py
+++ b/src/ZODB/utils.py
@@ -76,7 +76,7 @@ def oid_repr(oid):
         return repr(oid)
 
 serial_repr = oid_repr
-tid_repr = oid_repr
+tid_repr = serial_repr
 
 # For example, produce
 #     '0x03441422948b4399 2002-04-14 20:50:34.815000'