diff --git a/plwn/enums.py b/plwn/enums.py
index de9f4d8086be89a0d12c2e42fd731e76190f0bdf..f99afb6198bc3b667683f6886c61aea9354b310d 100644
--- a/plwn/enums.py
+++ b/plwn/enums.py
@@ -170,8 +170,9 @@ class VerbAspect(Enum):
     """Defines verb aspect values used in plWordNet."""
 
     if six.PY2:
-        __order__ = 'perfective imperfective predicative two_aspect'
+        __order__ = 'perfective imperfective predicative two_aspect no'
 
+    no = u'no'
     perfective = u'perf'
     imperfective = u'imperf'
     predicative = u'pred'