diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index bf6fa9fcc56..a6f9faf353f 100644
--- a/htdocs/comm/action/class/actioncomm.class.php
+++ b/htdocs/comm/action/class/actioncomm.class.php
@@ -1902,7 +1902,7 @@ class ActionComm extends CommonObject
 					}
 				}
 				if ($key == 'author') {
-					$sql .= " AND c.type = '".$this->db->escape($value)."'";
+					$sql .= " AND u.lastname = '".$this->db->escape($value)."'";
 				}
 			}