diff --git a/htdocs/lib/pdf.lib.php b/htdocs/lib/pdf.lib.php
index 081013697a2..fbe88e97d22 100644
--- a/htdocs/lib/pdf.lib.php
+++ b/htdocs/lib/pdf.lib.php
@@ -843,6 +843,26 @@ function pdf_getlineref($object,$i,$outputlangs)
     }
 }
 
+/**
+ *	Return line ref_supplier
+ *	@param		object				Object
+ *	@param		$i					Current line number
+ *  @param    	outputlang			Object lang for output
+ */
+function pdf_getlineref_supplier($object,$i,$outputlangs)
+{
+    if (! empty($object->hooks) && ( ($object->lines[$i]->product_type == 9 && !empty($object->lines[$i]->special_code) ) || ! empty($object->lines[$i]->fk_parent_line) ) )
+    {
+    	$special_code = $object->lines[$i]->special_code;
+    	if (! empty($object->lines[$i]->fk_parent_line)) $special_code = $object->getSpecialCode($object->lines[$i]->fk_parent_line);
+        // TODO add hook function
+    }
+    else
+    {
+        return dol_htmlentitiesbr($object->lines[$i]->ref_supplier);
+    }
+}
+
 /**
  *	Return line vat rate
  *	@param		object				Object