diff --git a/maya.py b/maya.py
index 61eb1f3..155098b 100644
--- a/maya.py
+++ b/maya.py
@@ -335,7 +335,7 @@ class MayaInterval(object):
 
         # # Start and duration, such as "2007-03-01T13:00:00Z/P1Y2M10DT2H30M"
         # # Duration and end, such as "P1Y2M10DT2H30M/2008-05-11T15:30:00Z"
-        raise NotImplentedError()
+        raise NotImplementedError()
 
 
     def __and__(self, i):