diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 1efc6c41d10..5b74e007a0e 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -1519,7 +1519,7 @@ class Facture extends CommonObject
         $now=dol_now();
 
         $error=0;
-        dol_syslog(get_class($this).'::validate force_number='.$force_number,' idwarehouse='.$idwarehouse, LOG_WARNING);
+        dol_syslog(get_class($this).'::validate force_number='.$force_number.', idwarehouse='.$idwarehouse, LOG_WARNING);
 
 	    // Check parameters
         if (! $this->brouillon)