diff --git a/MLP_theano_with_comments.ipynb b/MLP_theano_with_comments.ipynb
index e6dd2bb..905c9e2 100644
--- a/MLP_theano_with_comments.ipynb
+++ b/MLP_theano_with_comments.ipynb
@@ -96,6 +96,8 @@
     "# These are hyperparameters to play with.\n",
     "# Bias starting as zero is fine.\n",
     "import numpy.random as rng\n",
+    "import numpy\n",
+    
     "W_x = numpy.asarray(rng.normal(loc=0.0, scale=.05, size=(28*28, 500)), dtype=theano.config.floatX)\n",
     "b_h = numpy.zeros(shape=(500,), dtype=theano.config.floatX)\n",
     "\n",