diff --git a/module3/exo1/analyse-syndrome-grippal.ipynb b/module3/exo1/analyse-syndrome-grippal.ipynb
index c3461b7d8dcbd88cc95ea3e4c15f7cb8a2979138..14d057d745584329b45180a9684827be14aa39db 100644
--- a/module3/exo1/analyse-syndrome-grippal.ipynb
+++ b/module3/exo1/analyse-syndrome-grippal.ipynb
@@ -75,7 +75,7 @@
     "import os.path\n",
     "data_file = \"inciden-PAY-3.csv\"\n",
     "folder_path = \"myLocalisation/\"\n",
-    "if not (os.path(folder_path + data_file)) : \n",
+    "if not (os.path.exists(folder_path + data_file)) : \n",
     "    df = pd.read_csv(data_url)\n",
     "    df.to_csv(folder_path + data_file, sep = '\\t')"
    ]