diff --git a/htdocs/contrat/class/contrat.class.php b/htdocs/contrat/class/contrat.class.php
index 755d3ff4bf0..215dc185ac4 100644
--- a/htdocs/contrat/class/contrat.class.php
+++ b/htdocs/contrat/class/contrat.class.php
@@ -264,6 +264,7 @@ class Contrat extends CommonObject
      *  @param	int			$notrigger		1=Does not execute triggers, 0=Execute triggers
      *  @param	string		$comment		Comment
 	 *	@return	int							<0 if KO, >0 if OK
+	 *  @see closeAll
 	 */
 	function activateAll($user, $date_start='', $notrigger=0, $comment='')
 	{
@@ -279,7 +280,7 @@ class Contrat extends CommonObject
 		foreach($this->lines as $contratline)
 		{
 			// Open lines not already open
-			if ($contratline->statut != 4)
+			if ($contratline->statut != ContratLigne::STATUS_OPEN)
 			{
 				$contratline->context = $this->context;
 
@@ -319,6 +320,7 @@ class Contrat extends CommonObject
      * @param	int			$notrigger		1=Does not execute triggers, 0=Execute triggers
      * @param	string		$comment		Comment
 	 * @return	int							<0 if KO, >0 if OK
+	 * @see activateAll
 	 */
 	function closeAll(User $user, $notrigger=0, $comment='')
 	{
@@ -334,11 +336,11 @@ class Contrat extends CommonObject
 		foreach($this->lines as $contratline)
 		{
 			// Close lines not already closed
-	        if ($contratline->statut != 5)
+			if ($contratline->statut != ContratLigne::STATUS_CLOSED)
 	        {
 				$contratline->date_cloture=$now;
 				$contratline->fk_user_cloture=$user->id;
-				$contratline->statut='5';
+				$contratline->statut=ContratLigne::STATUS_CLOSED;
 				$result=$contratline->close_line($user, $now, $comment, $notrigger);
 				if ($result < 0)
 				{
@@ -806,10 +808,10 @@ class Contrat extends CommonObject
 				//dol_syslog("1 ".$line->desc);
 				//dol_syslog("2 ".$line->product_desc);
 
-				if ($line->statut == 0) $this->nbofserviceswait++;
-				if ($line->statut == 4 && (empty($line->date_fin_prevue) || $line->date_fin_prevue >= $now)) $this->nbofservicesopened++;
-				if ($line->statut == 4 && (! empty($line->date_fin_prevue) && $line->date_fin_prevue < $now)) $this->nbofservicesexpired++;
-				if ($line->statut == 5) $this->nbofservicesclosed++;
+				if ($line->statut == ContratLigne::STATUS_INITIAL) $this->nbofserviceswait++;
+				if ($line->statut == ContratLigne::STATUS_OPEN && (empty($line->date_fin_prevue) || $line->date_fin_prevue >= $now)) $this->nbofservicesopened++;
+				if ($line->statut == ContratLigne::STATUS_OPEN && (! empty($line->date_fin_prevue) && $line->date_fin_prevue < $now)) $this->nbofservicesexpired++;
+				if ($line->statut == ContratLigne::STATUS_CLOSED) $this->nbofservicesclosed++;
 
 				$total_ttc+=$objp->total_ttc;   // TODO Not saved into database
                 $total_vat+=$objp->total_tva;
@@ -2518,6 +2520,11 @@ class ContratLigne extends CommonObjectLine
 	var $fk_user_cloture;
 	var $commentaire;
 
+	const STATUS_INITIAL = 0;
+	const STATUS_OPEN = 4;
+	const STATUS_CLOSED = 5;
+
+
 
 	/**
      *  Constructor
@@ -2556,51 +2563,51 @@ class ContratLigne extends CommonObjectLine
 		$langs->load("contracts");
 		if ($mode == 0)
 		{
-			if ($statut == 0) { return $langs->trans("ServiceStatusInitial"); }
-			if ($statut == 4 && $expired == -1) { return $langs->trans("ServiceStatusRunning"); }
-			if ($statut == 4 && $expired == 0)  { return $langs->trans("ServiceStatusNotLate"); }
-			if ($statut == 4 && $expired == 1)  { return $langs->trans("ServiceStatusLate"); }
-			if ($statut == 5) { return $langs->trans("ServiceStatusClosed");  }
+			if ($statut == self::STATUS_INITIAL) { return $langs->trans("ServiceStatusInitial"); }
+			if ($statut == self::STATUS_OPEN && $expired == -1) { return $langs->trans("ServiceStatusRunning"); }
+			if ($statut == self::STATUS_OPEN && $expired == 0)  { return $langs->trans("ServiceStatusNotLate"); }
+			if ($statut == self::STATUS_OPEN && $expired == 1)  { return $langs->trans("ServiceStatusLate"); }
+			if ($statut == self::STATUS_CLOSED) { return $langs->trans("ServiceStatusClosed");  }
 		}
 		if ($mode == 1)
 		{
-			if ($statut == 0) { return $langs->trans("ServiceStatusInitial"); }
-			if ($statut == 4 && $expired == -1) { return $langs->trans("ServiceStatusRunning"); }
-			if ($statut == 4 && $expired == 0)  { return $langs->trans("ServiceStatusNotLateShort"); }
-			if ($statut == 4 && $expired == 1)  { return $langs->trans("ServiceStatusLateShort"); }
-			if ($statut == 5) { return $langs->trans("ServiceStatusClosed");  }
+			if ($statut == self::STATUS_INITIAL) { return $langs->trans("ServiceStatusInitial"); }
+			if ($statut == self::STATUS_OPEN && $expired == -1) { return $langs->trans("ServiceStatusRunning"); }
+			if ($statut == self::STATUS_OPEN && $expired == 0)  { return $langs->trans("ServiceStatusNotLateShort"); }
+			if ($statut == self::STATUS_OPEN && $expired == 1)  { return $langs->trans("ServiceStatusLateShort"); }
+			if ($statut == self::STATUS_CLOSED) { return $langs->trans("ServiceStatusClosed");  }
 		}
 		if ($mode == 2)
 		{
-			if ($statut == 0) { return img_picto($langs->trans('ServiceStatusInitial'),'statut0').' '.$langs->trans("ServiceStatusInitial"); }
-			if ($statut == 4 && $expired == -1) { return img_picto($langs->trans('ServiceStatusRunning'),'statut4').' '.$langs->trans("ServiceStatusRunning"); }
-			if ($statut == 4 && $expired == 0)  { return img_picto($langs->trans('ServiceStatusNotLate'),'statut4').' '.$langs->trans("ServiceStatusNotLateShort"); }
-			if ($statut == 4 && $expired == 1)  { return img_picto($langs->trans('ServiceStatusLate'),'statut3').' '.$langs->trans("ServiceStatusLateShort"); }
-			if ($statut == 5) { return img_picto($langs->trans('ServiceStatusClosed'),'statut6') .' '.$langs->trans("ServiceStatusClosed"); }
+			if ($statut == self::STATUS_INITIAL) { return img_picto($langs->trans('ServiceStatusInitial'),'statut0').' '.$langs->trans("ServiceStatusInitial"); }
+			if ($statut == self::STATUS_OPEN && $expired == -1) { return img_picto($langs->trans('ServiceStatusRunning'),'statut4').' '.$langs->trans("ServiceStatusRunning"); }
+			if ($statut == self::STATUS_OPEN && $expired == 0)  { return img_picto($langs->trans('ServiceStatusNotLate'),'statut4').' '.$langs->trans("ServiceStatusNotLateShort"); }
+			if ($statut == self::STATUS_OPEN && $expired == 1)  { return img_picto($langs->trans('ServiceStatusLate'),'statut3').' '.$langs->trans("ServiceStatusLateShort"); }
+			if ($statut == self::STATUS_CLOSED) { return img_picto($langs->trans('ServiceStatusClosed'),'statut6') .' '.$langs->trans("ServiceStatusClosed"); }
 		}
 		if ($mode == 3)
 		{
-			if ($statut == 0) { return img_picto($langs->trans('ServiceStatusInitial'),'statut0',$moreatt); }
-			if ($statut == 4 && $expired == -1) { return img_picto($langs->trans('ServiceStatusRunning'),'statut4',$moreatt); }
-			if ($statut == 4 && $expired == 0)  { return img_picto($langs->trans('ServiceStatusNotLate'),'statut4',$moreatt); }
-			if ($statut == 4 && $expired == 1)  { return img_picto($langs->trans('ServiceStatusLate'),'statut3',$moreatt); }
-			if ($statut == 5) { return img_picto($langs->trans('ServiceStatusClosed'),'statut6',$moreatt); }
+			if ($statut == self::STATUS_INITIAL) { return img_picto($langs->trans('ServiceStatusInitial'),'statut0',$moreatt); }
+			if ($statut == self::STATUS_OPEN && $expired == -1) { return img_picto($langs->trans('ServiceStatusRunning'),'statut4',$moreatt); }
+			if ($statut == self::STATUS_OPEN && $expired == 0)  { return img_picto($langs->trans('ServiceStatusNotLate'),'statut4',$moreatt); }
+			if ($statut == self::STATUS_OPEN && $expired == 1)  { return img_picto($langs->trans('ServiceStatusLate'),'statut3',$moreatt); }
+			if ($statut == self::STATUS_CLOSED) { return img_picto($langs->trans('ServiceStatusClosed'),'statut6',$moreatt); }
 		}
 		if ($mode == 4)
 		{
-			if ($statut == 0) { return img_picto($langs->trans('ServiceStatusInitial'),'statut0').' '.$langs->trans("ServiceStatusInitial"); }
-			if ($statut == 4 && $expired == -1) { return img_picto($langs->trans('ServiceStatusRunning'),'statut4').' '.$langs->trans("ServiceStatusRunning"); }
-			if ($statut == 4 && $expired == 0)  { return img_picto($langs->trans('ServiceStatusNotLate'),'statut4').' '.$langs->trans("ServiceStatusNotLate"); }
-			if ($statut == 4 && $expired == 1)  { return img_picto($langs->trans('ServiceStatusLate'),'statut3').' '.$langs->trans("ServiceStatusLate"); }
-			if ($statut == 5) { return img_picto($langs->trans('ServiceStatusClosed'),'statut6') .' '.$langs->trans("ServiceStatusClosed"); }
+			if ($statut == self::STATUS_INITIAL) { return img_picto($langs->trans('ServiceStatusInitial'),'statut0').' '.$langs->trans("ServiceStatusInitial"); }
+			if ($statut == self::STATUS_OPEN && $expired == -1) { return img_picto($langs->trans('ServiceStatusRunning'),'statut4').' '.$langs->trans("ServiceStatusRunning"); }
+			if ($statut == self::STATUS_OPEN && $expired == 0)  { return img_picto($langs->trans('ServiceStatusNotLate'),'statut4').' '.$langs->trans("ServiceStatusNotLate"); }
+			if ($statut == self::STATUS_OPEN && $expired == 1)  { return img_picto($langs->trans('ServiceStatusLate'),'statut3').' '.$langs->trans("ServiceStatusLate"); }
+			if ($statut == self::STATUS_CLOSED) { return img_picto($langs->trans('ServiceStatusClosed'),'statut6') .' '.$langs->trans("ServiceStatusClosed"); }
 		}
 		if ($mode == 5)
 		{
-			if ($statut == 0) { return $langs->trans("ServiceStatusInitial").' '.img_picto($langs->trans('ServiceStatusInitial'),'statut0'); }
-			if ($statut == 4 && $expired == -1) { return $langs->trans("ServiceStatusRunning").' '.img_picto($langs->trans('ServiceStatusRunning'),'statut4'); }
-			if ($statut == 4 && $expired == 0)  { return $langs->trans("ServiceStatusNotLateShort").' '.img_picto($langs->trans('ServiceStatusNotLateShort'),'statut4'); }
-			if ($statut == 4 && $expired == 1)  { return $langs->trans("ServiceStatusLateShort").' '.img_picto($langs->trans('ServiceStatusLate'),'statut3'); }
-			if ($statut == 5) { return $langs->trans("ServiceStatusClosed").' '.img_picto($langs->trans('ServiceStatusClosed'),'statut6'); }
+			if ($statut == self::STATUS_INITIAL) { return $langs->trans("ServiceStatusInitial").' '.img_picto($langs->trans('ServiceStatusInitial'),'statut0'); }
+			if ($statut == self::STATUS_OPEN && $expired == -1) { return $langs->trans("ServiceStatusRunning").' '.img_picto($langs->trans('ServiceStatusRunning'),'statut4'); }
+			if ($statut == self::STATUS_OPEN && $expired == 0)  { return $langs->trans("ServiceStatusNotLateShort").' '.img_picto($langs->trans('ServiceStatusNotLateShort'),'statut4'); }
+			if ($statut == self::STATUS_OPEN && $expired == 1)  { return $langs->trans("ServiceStatusLateShort").' '.img_picto($langs->trans('ServiceStatusLate'),'statut3'); }
+			if ($statut == self::STATUS_CLOSED) { return $langs->trans("ServiceStatusClosed").' '.img_picto($langs->trans('ServiceStatusClosed'),'statut6'); }
 		}
 	}
 
@@ -3096,13 +3103,13 @@ class ContratLigne extends CommonObjectLine
 
 		$this->db->begin();
 
-		$sql = "UPDATE " . MAIN_DB_PREFIX . "contratdet SET statut = 4,";
+		$sql = "UPDATE " . MAIN_DB_PREFIX . "contratdet SET statut = ".ContratLigne::STATUS_OPEN.",";
 		$sql .= " date_ouverture = " . (dol_strlen($date) != 0 ? "'" . $this->db->idate($date) . "'" : "null") . ",";
 		if ($date_end >= 0) $sql .= " date_fin_validite = " . (dol_strlen($date_end) != 0 ? "'" . $this->db->idate($date_end) . "'" : "null") . ",";
 		$sql .= " fk_user_ouverture = " . $user->id . ",";
 		$sql .= " date_cloture = null,";
 		$sql .= " commentaire = '" . $this->db->escape($comment) . "'";
-		$sql .= " WHERE rowid = " . $this->id . " AND (statut = 0 OR statut = 3 OR statut = 5)";
+		$sql .= " WHERE rowid = " . $this->id . " AND (statut = ".ContratLigne::STATUS_INITIAL." OR statut = ".ContratLigne::STATUS_CLOSED.")";
 
 		dol_syslog(get_class($this) . "::active_line", LOG_DEBUG);
 		$resql = $this->db->query($sql);
@@ -3114,7 +3121,7 @@ class ContratLigne extends CommonObjectLine
 
 			if (! $error)
 			{
-				$this->statut = 4;
+				$this->statut = ContratLigne::STATUS_OPEN;
 				$this->date_ouverture = $date;
 				$this->date_fin_validite = $date_end;
 				$this->fk_user_ouverture = $user->id;
@@ -3160,11 +3167,11 @@ class ContratLigne extends CommonObjectLine
 
 		$this->db->begin();
 
-		$sql = "UPDATE " . MAIN_DB_PREFIX . "contratdet SET statut = 5,";
+		$sql = "UPDATE " . MAIN_DB_PREFIX . "contratdet SET statut = ".ContratLigne::STATUS_CLOSED.",";
 		$sql .= " date_cloture = '" . $this->db->idate($date_end) . "',";
 		$sql .= " fk_user_cloture = " . $user->id . ",";
 		$sql .= " commentaire = '" . $this->db->escape($comment) . "'";
-		$sql .= " WHERE rowid = " . $this->id . " AND statut = 4";
+		$sql .= " WHERE rowid = " . $this->id . " AND statut = ".ContratLigne::STATUS_OPEN;
 
 		$resql = $this->db->query($sql);
 		if ($resql)