diff --git a/MySQLdb/times.py b/MySQLdb/times.py
index 4040f8e..0ff7476 100644
--- a/MySQLdb/times.py
+++ b/MySQLdb/times.py
@@ -52,10 +52,11 @@ def DateTime_or_None(s):
     try:
         d, t = s.split(sep, 1)
         if '.' in t:
-            t, m = t.split('.',1)
+            t, ms = t.split('.',1)
+            ms = ms.ljust(6, '0')
         else:
-            m = 0
-        return datetime(*[ int(x) for x in d.split('-')+t.split(':')+[m] ])
+            ms = 0
+        return datetime(*[ int(x) for x in d.split('-')+t.split(':')+[ms] ])
     except (SystemExit, KeyboardInterrupt):
         raise
     except:
@@ -66,6 +67,7 @@ def TimeDelta_or_None(s):
         h, m, s = s.split(':')
         if '.' in s:
             s, ms = s.split('.')
+            ms = ms.ljust(6, '0')
         else:
             ms = 0
         h, m, s, ms = int(h), int(m), int(s), int(ms)
@@ -84,6 +86,7 @@ def Time_or_None(s):
         h, m, s = s.split(':')
         if '.' in s:
             s, ms = s.split('.')
+            ms = ms.ljust(6, '0')
         else:
             ms = 0
         h, m, s, ms = int(h), int(m), int(s), int(ms)