diff --git a/03_classification.ipynb b/03_classification.ipynb
index 519a16c..ca683d8 100644
--- a/03_classification.ipynb
+++ b/03_classification.ipynb
@@ -1903,10 +1903,10 @@
     "SPAM_URL = DOWNLOAD_ROOT + \"20030228_spam.tar.bz2\"\n",
     "SPAM_PATH = os.path.join(\"datasets\", \"spam\")\n",
     "\n",
-    "def fetch_spam_data(spam_url=SPAM_URL, spam_path=SPAM_PATH):\n",
+    "def fetch_spam_data(ham_url=HAM_URL, spam_url=SPAM_URL, spam_path=SPAM_PATH):\n",
     "    if not os.path.isdir(spam_path):\n",
     "        os.makedirs(spam_path)\n",
-    "    for filename, url in ((\"ham.tar.bz2\", HAM_URL), (\"spam.tar.bz2\", spam_url)):\n",
+    "    for filename, url in ((\"ham.tar.bz2\", ham_url), (\"spam.tar.bz2\", spam_url)):\n",
     "        path = os.path.join(spam_path, filename)\n",
     "        if not os.path.isfile(path):\n",
     "            urllib.request.urlretrieve(url, path)\n",