diff --git a/sources/creation_sondage.php b/sources/creation_sondage.php
index 08a7fb8..2c6013b 100644
--- a/sources/creation_sondage.php
+++ b/sources/creation_sondage.php
@@ -102,7 +102,7 @@ function ajouter_sondage()
             );
         }
     }
-    error_log(date('H:i:s d/m/Y:') . ' CREATION: '.$poll."\t".$_SESSION[formatsondage]."\t".$_SESSION[nom]."\t".$_SESSION[adresse]."\t \t".$_SESSION[toutchoix]."\n", 3, 'admin/logs_studs.txt');
+    error_log(date('H:i:s d/m/Y:') . ' CREATION: '.$poll."\t".$_SESSION['formatsondage']."\t".$_SESSION['nom']."\t".$_SESSION['adresse']."\t \t".$_SESSION['toutchoix']."\n", 3, 'admin/logs_studs.txt');
     Utils::cleaning_polls($connect, 'admin/logs_studs.txt');
 
     // Don't keep days, hours and choices in memory (in order to make new polls)