diff --git a/module3/exo1/analyse-syndrome-grippal.ipynb b/module3/exo1/analyse-syndrome-grippal.ipynb
index 9578e793ccffe12f6115c122650b60ddd78af39b..bd3b68cba643914f8564ce31b7aa5edf41e474be 100644
--- a/module3/exo1/analyse-syndrome-grippal.ipynb
+++ b/module3/exo1/analyse-syndrome-grippal.ipynb
@@ -82,7 +82,7 @@
     "import urllib.request\n",
     "import os\n",
     "data_file = \"incidence-PAY-3.csv\"\n",
-    "if bot os.path.isfile(data_file):\n",
+    "if not os.path.isfile(data_file):\n",
     "  urllib.request.urlretrieve(data_url, data_file)"
    ]
   },