diff --git a/htdocs/opensurvey/class/opensurveysondage.class.php b/htdocs/opensurvey/class/opensurveysondage.class.php
index 0a3f2c571df62112b8d9eee22f15b7694b2cccb4..188e830be63bc4e32f306793b637dcabe62ea20d 100644
--- a/htdocs/opensurvey/class/opensurveysondage.class.php
+++ b/htdocs/opensurvey/class/opensurveysondage.class.php
@@ -337,7 +337,7 @@ class Opensurveysondage extends CommonObject
 	 *
      *	@param  User	$user        		User that deletes
      *  @param  int		$notrigger	 		0=launch triggers after, 1=disable triggers
-     *  @param	string	$numsondageadmin	Num sondage to delete
+     *  @param	string	$numsondageadmin	Num sondage admin to delete
 	 *  @return	int					 		<0 if KO, >0 if OK
 	 */
 	function delete($user, $notrigger, $numsondageadmin)
@@ -345,6 +345,8 @@ class Opensurveysondage extends CommonObject
 		global $conf, $langs;
 		$error=0;
 
+		$numsondage=substr($numsondageadmin, 0, 16);
+		
 		$this->db->begin();
 
 		if (! $error)
@@ -366,10 +368,10 @@ class Opensurveysondage extends CommonObject
 		if (! $error)
 		{
 
-			$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_comments WHERE id_sondage_admin = '".$numsondageadmin."'";
+			$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_comments WHERE id_sondage = '".$numsondage."'";
 			dol_syslog(get_class($this)."::delete sql=".$sql, LOG_DEBUG);
 			$resql=$this->db->query($sql);
-			$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_user_studs WHERE id_sondage_admin = '".$numsondageadmin."'";
+			$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_user_studs WHERE id_sondage = '".$numsondage."'";
 			dol_syslog(get_class($this)."::delete sql=".$sql, LOG_DEBUG);
 			$resql=$this->db->query($sql);
 
diff --git a/htdocs/opensurvey/list.php b/htdocs/opensurvey/list.php
index 506ffecc99e19c21d24c620f93a694109cfedf92..c87526ce5ca389f85e912589e3f37d1840c2890c 100755
--- a/htdocs/opensurvey/list.php
+++ b/htdocs/opensurvey/list.php
@@ -27,6 +27,7 @@ require_once(DOL_DOCUMENT_ROOT."/core/lib/files.lib.php");
 
 $action=GETPOST('action');
 $id=GETPOST('id');
+$numsondage=substr($id, 0, 16);
 
 if (! $sortorder) $sortorder="ASC";
 if (! $sortfield) $sortfield="p.titre";
@@ -45,16 +46,10 @@ if ($action == 'delete_confirm')
 {
 	$db->begin();
 
-	$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_comments WHERE id_sondage_admin = '".$id."'";
-	dol_syslog("Delete poll sql=".$sql, LOG_DEBUG);
-	$resql=$db->query($sql);
-	$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_user_studs WHERE id_sondage_admin = '".$id."'";
-	dol_syslog("Delete poll sql=".$sql, LOG_DEBUG);
-	$resql=$db->query($sql);
-	$sql='DELETE FROM '.MAIN_DB_PREFIX."opensurvey_sondage WHERE id_sondage_admin = '".$id."'";
-	dol_syslog("Delete poll sql=".$sql, LOG_DEBUG);
-	$resql=$db->query($sql);
-
+	$object=new Opensurveysondage($db);
+	
+	$result=$object->delete($user,'',$numsondageadmin);
+	
 	$db->commit();
 }