diff --git a/GPy/core/parameterization/priorizable.py b/GPy/core/parameterization/priorizable.py
index 1d1153c7..eb82e862 100644
--- a/GPy/core/parameterization/priorizable.py
+++ b/GPy/core/parameterization/priorizable.py
@@ -16,7 +16,7 @@ class Priorizable(Parameterizable):
 
     def __setstate__(self, state):
         super(Priorizable, self).__setstate__(state)
-        self._index_operations['priors'] = self.priors
+        #self._index_operations['priors'] = self.priors
 
 
     #===========================================================================