diff --git a/htdocs/core/class/commonobjectline.class.php b/htdocs/core/class/commonobjectline.class.php
index 3ba7cbf52ca..675e1cf0794 100644
--- a/htdocs/core/class/commonobjectline.class.php
+++ b/htdocs/core/class/commonobjectline.class.php
@@ -26,7 +26,7 @@
  *  Parent class for class inheritance lines of business objects
  *  This class is useless for the moment so no inherit are done on it
  */
-abstract class CommonObjectLine extends CommonObject
+abstract class CommonObjectLine
 {
     /**
      * Call trigger based on this instance