diff --git a/htdocs/compta/facture/class/facture-rec.class.php b/htdocs/compta/facture/class/facture-rec.class.php
index c478387a37a..e8d97f28e29 100644
--- a/htdocs/compta/facture/class/facture-rec.class.php
+++ b/htdocs/compta/facture/class/facture-rec.class.php
@@ -1895,8 +1895,6 @@ class FactureLigneRec extends CommonInvoiceLine
 	 */
 	public $table_element = 'facturedet_rec';
 
-	public $date_start_fill;
-	public $date_end_fill;
 
 
 	/**
diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index b5e525f050a..2c890aa21de 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -756,7 +756,7 @@ class Facture extends CommonInvoice
 					$newinvoiceline->origin_id = $this->lines[$i]->id;
 
 					// Auto set date of service ?
-					if ($this->lines[$i]->date_start_fill == 1 && $originaldatewhen)			// $originaldatewhen is defined when generating from recurring invoice only
+					if ($this->lines[$i]->date_start_fill == 1 && $originaldatewhen)		// $originaldatewhen is defined when generating from recurring invoice only
 					{
 						$newinvoiceline->date_start = $originaldatewhen;
 					}
diff --git a/htdocs/core/class/commoninvoice.class.php b/htdocs/core/class/commoninvoice.class.php
index c8ca158e981..c0b45d693df 100644
--- a/htdocs/core/class/commoninvoice.class.php
+++ b/htdocs/core/class/commoninvoice.class.php
@@ -941,6 +941,10 @@ abstract class CommonInvoiceLine extends CommonObjectLine
 	 */
 	public $info_bits = 0;
 
+	public $date_start_fill;	// If set to 1, when invoice is created from a template invoice, it will also auto set the field date_start at creation
+	public $date_end_fill;		// If set to 1, when invoice is created from a template invoice, it will also auto set the field date_end at creation
+
+
 	/**
 	 *  Constructor
 	 *