diff --git a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
index def09507b92..778b6525d21 100644
--- a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
@@ -1221,7 +1221,7 @@ class pdf_einstein extends ModelePDFCommandes
 	 *  @param  int	    	$showaddress    0=no, 1=yes
 	 *  @param  Translate	$outputlangs	Object lang for output
 	 *  @param	string		$titlekey		Translation key to show as title of document
-	 *  @return	void
+	 *  @return	int                         Return topshift value
 	 */
 	function _pagehead(&$pdf, $object, $showaddress, $outputlangs, $titlekey="PdfOrderTitle")
 	{
diff --git a/htdocs/core/modules/commande/doc/pdf_proforma.modules.php b/htdocs/core/modules/commande/doc/pdf_proforma.modules.php
index ebbe72f94c9..7a2c1f724c0 100644
--- a/htdocs/core/modules/commande/doc/pdf_proforma.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_proforma.modules.php
@@ -65,12 +65,12 @@ class pdf_proforma extends pdf_einstein
 	 *  @param  int	    	$showaddress    0=no, 1=yes
 	 *  @param  Translate	$outputlangs	Object lang for output
 	 *  @param	string		$titlekey		Translation key to show as title of document
-	 *  @return	void
+	 *  @return	int                         Return topshift value
 	 */
 	function _pagehead(&$pdf, $object, $showaddress, $outputlangs, $titlekey="InvoiceProForma")
 	{
 		global $conf,$langs,$hookmanager;
 
-		parent::_pagehead($pdf, $object, $showaddress, $outputlangs, $titlekey);
+		return parent::_pagehead($pdf, $object, $showaddress, $outputlangs, $titlekey);
 	}
 }