diff --git a/intro_to_gmm_&_em.ipynb b/intro_to_gmm_&_em.ipynb
index a078057..90887b1 100644
--- a/intro_to_gmm_&_em.ipynb
+++ b/intro_to_gmm_&_em.ipynb
@@ -661,6 +661,7 @@
     "\n",
     "    def iterate(self, N=1, verbose=False):\n",
     "        \"Perform N iterations, then compute log-likelihood\"\n",
+    "         self.Mstep(self.Estep())\n"
     "\n",
     "    def pdf(self, x):\n",
     "        return (self.mix)*self.one.pdf(x) + (1-self.mix)*self.two.pdf(x)\n",