diff --git a/GPy/core/gp_base.py b/GPy/core/gp_base.py
index 3eb977c6..29234c4d 100644
--- a/GPy/core/gp_base.py
+++ b/GPy/core/gp_base.py
@@ -24,6 +24,9 @@ class GPBase(model.model):
             self._Xmean = X.mean(0)[None, :]
             self._Xstd = X.std(0)[None, :]
             self.X = (X.copy() - self._Xmean) / self._Xstd
+        else:
+            self._Xmean = np.zeros((1,self.Q))
+            self._Xstd = np.ones((1,self.Q))
 
         super(GPBase, self).__init__()
 
diff --git a/GPy/models/GP_regression.py b/GPy/models/GP_regression.py
index 2979456b..e5acb4f7 100644
--- a/GPy/models/GP_regression.py
+++ b/GPy/models/GP_regression.py
@@ -31,5 +31,5 @@ class GP_regression(GP):
 
         likelihood = likelihoods.Gaussian(Y,normalize=normalize_Y)
 
-        super(GP_regression, self).__init__(self, X, likelihood, kernel, normalize_X=normalize_X)
+        super(GP_regression, self).__init__(X, likelihood, kernel, normalize_X=normalize_X)
         self._set_params(self._get_params())