diff --git a/GPy/core/parameterization/parameterized.py b/GPy/core/parameterization/parameterized.py
index 4198e22c..d712b382 100644
--- a/GPy/core/parameterization/parameterized.py
+++ b/GPy/core/parameterization/parameterized.py
@@ -69,8 +69,7 @@ class Parameterized(Constrainable, Pickleable, Observable):
         super(Parameterized, self).__init__(name=name)
         self._in_init_ = True
         self._constraints_ = None#ParameterIndexOperations()
-        if not hasattr(self, "_parameters_"):
-            self._parameters_ = []
+        self._parameters_ = []
         self.size = sum(p.size for p in self._parameters_)
         if not self._has_fixes():
             self._fixes_ = None
@@ -212,14 +211,12 @@ class Parameterized(Constrainable, Pickleable, Observable):
         if not hasattr(self, "_parameters_") or len(self._parameters_) < 1:
             # no parameters for this class
             return
-        i = 0
         sizes = [0]
         self._param_slices_ = []
-        for p in self._parameters_:
+        for i,p in enumerate(self._parameters_):
             p._direct_parent_ = self
             p._parent_index_ = i
             p._connect_highest_parent(self)
-            i += 1
             not_unique = []
             sizes.append(p.size+sizes[-1])
             self._param_slices_.append(slice(sizes[-2], sizes[-1]))
@@ -240,7 +237,6 @@ class Parameterized(Constrainable, Pickleable, Observable):
             # no parameters for this class
             return
         for p in self._parameters_:
-            p._highest_parent_ = highest_parent
             p._connect_highest_parent(highest_parent)
 
     #===========================================================================
diff --git a/GPy/kern/kern.py b/GPy/kern/kern.py
index 68b26e3c..6a8bc745 100644
--- a/GPy/kern/kern.py
+++ b/GPy/kern/kern.py
@@ -180,8 +180,10 @@ class kern(Parameterized):
         :type tensor: bool
 
         """
-        K1 = self.copy()
-        K2 = other.copy()
+        K1 = self
+        K2 = other
+        #K1 = self.copy()
+        #K2 = other.copy()
 
         slices = []
         for sl1, sl2 in itertools.product(K1.input_slices, K2.input_slices):