diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index c281d9bebbd..019be7fcc09 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -381,7 +381,7 @@ abstract class CommonObject
      */
     function errorsToString()
     {
-    	return $this->error.(is_array($this->errors)?(($this->error!=''?' ':'').join(',',$this->errors)):'');
+    	return $this->error.(is_array($this->errors)?(($this->error!=''?', ':'').join(', ',$this->errors)):'');
     }
 
     /**