diff --git a/htdocs/commande/commande.class.php b/htdocs/commande/commande.class.php
index bfae7157046..5dc6787be19 100644
--- a/htdocs/commande/commande.class.php
+++ b/htdocs/commande/commande.class.php
@@ -509,7 +509,7 @@ class Commande extends CommonObject
     $sql.= " '".addslashes($this->note)."', ";
     $sql.= " '".addslashes($this->note_public)."', ";
     $sql.= " '".addslashes($this->ref_client)."', '".$this->modelpdf."', '".$this->cond_reglement_id."', '".$this->mode_reglement_id."',";
-    $sql.= " '".($this->date_livraison?$this->db->idate($this->date_livraison):'null')."',";
+    $sql.= " '".($this->date_livraison?$this->db->idate($this->date_livraison):'')."',";
     $sql.= " '".$this->adresse_livraison_id."',";
     $sql.= " '".$this->remise_absolue."',";
     $sql.= " '".$this->remise_percent."')";
diff --git a/htdocs/commande/fiche.php b/htdocs/commande/fiche.php
index 932c409f2dd..b0af05ecfac 100644
--- a/htdocs/commande/fiche.php
+++ b/htdocs/commande/fiche.php
@@ -1174,7 +1174,7 @@ else
 				}
 				else
 				{
-					print dolibarr_print_date($commande->date_livraison,'daytext');
+					print $commande->date_livraison ? dolibarr_print_date($commande->date_livraison,'daytext') : ' ';
 				}
 				print '</td>';
 				print '<td rowspan="'.$nbrow.'" valign="top">'.$langs->trans('NotePublic').' :<br>';
diff --git a/htdocs/lib/functions.inc.php b/htdocs/lib/functions.inc.php
index 42478e2635f..761c3bcb7fc 100644
--- a/htdocs/lib/functions.inc.php
+++ b/htdocs/lib/functions.inc.php
@@ -533,7 +533,7 @@ function dolibarr_print_date($time,$format='')
 	if (! $format) $format='%Y-%m-%d %H:%M:%S';
 
     // Si date non définie, on renvoie ''
-    if ("$time" == "") return '';		// $time=0 permis car signifie 01/01/1970 00:00:00
+    if ($time == "") return '';		// $time=0 permis car signifie 01/01/1970 00:00:00
 
     // Analyse de la date
     if (eregi('^([0-9]+)\-([0-9]+)\-([0-9]+) ?([0-9]+)?:?([0-9]+)?:?([0-9]+)?',$time,$reg))