diff --git a/Lib/exceptions.py b/Lib/exceptions.py
index b785a7c..43d1c2d 100644
--- a/Lib/exceptions.py
+++ b/Lib/exceptions.py
@@ -61,6 +61,9 @@
       |    +-- FloatingPointError
       |
       +-- ValueError
+      |    |
+      |    +-- UnicodeError(*)
+      |
       +-- SystemError
       +-- MemoryError
 """
@@ -224,6 +227,10 @@
     """Local name referenced but not bound to a value."""
     pass
 
+class UnicodeError(ValueError):
+    """Unicode related error."""
+    pass
+
 class MemoryError(StandardError):
     """Out of memory."""
     pass