diff --git a/doc/ipython-notebooks/multiclass/naive_bayes.ipynb b/doc/ipython-notebooks/multiclass/naive_bayes.ipynb
index d818fbc38aa..6f6c0feb30b 100644
--- a/doc/ipython-notebooks/multiclass/naive_bayes.ipynb
+++ b/doc/ipython-notebooks/multiclass/naive_bayes.ipynb
@@ -161,7 +161,7 @@
     "x = np.arange(-20, 20, delta)\n",
     "y = np.arange(-20, 20, delta)\n",
     "X,Y = np.meshgrid(x,y)\n",
-    "Z = machine.apply_multiclass(RealFeatures(np.vstack((X.flatten(), Y.flatten())))).get_labels()"
+    "Z = machine.apply_multiclass(features(np.vstack((X.flatten(), Y.flatten())))).get_labels()"
    ]
   },
   {