diff --git a/htdocs/compta/resultat/clientfourn.php b/htdocs/compta/resultat/clientfourn.php
index 3a2d5a9a5fe..8b67cf318c7 100644
--- a/htdocs/compta/resultat/clientfourn.php
+++ b/htdocs/compta/resultat/clientfourn.php
@@ -44,7 +44,7 @@ $date_startyear=GETPOST('date_startyear','int');
 $date_endmonth=GETPOST('date_endmonth','int');
 $date_endday=GETPOST('date_endday','int');
 $date_endyear=GETPOST('date_endyear','int');
-$showaccountdetail = GETPOST('showaccountdetail','aZ09');
+$showaccountdetail = GETPOST('showaccountdetail','aZ09')?GETPOST('showaccountdetail','aZ09'):'no';
 
 // Security check
 $socid = GETPOST('socid','int');
diff --git a/htdocs/compta/resultat/result.php b/htdocs/compta/resultat/result.php
index 4917513438a..3de3cea5d0f 100644
--- a/htdocs/compta/resultat/result.php
+++ b/htdocs/compta/resultat/result.php
@@ -41,7 +41,7 @@ $selectcpt = GETPOST('cpt_bk');
 $id = GETPOST('id', 'int');
 $rowid = GETPOST('rowid', 'int');
 $cancel = GETPOST('cancel','alpha');
-$showaccountdetail = GETPOST('showaccountdetail','aZ09');
+$showaccountdetail = GETPOST('showaccountdetail','aZ09')?GETPOST('showaccountdetail','aZ09'):'no';
 
 
 $date_startmonth=GETPOST('date_startmonth','int');