diff --git a/htdocs/core/lib/categories.lib.php b/htdocs/core/lib/categories.lib.php
index 179ff317294..293644be5dc 100644
--- a/htdocs/core/lib/categories.lib.php
+++ b/htdocs/core/lib/categories.lib.php
@@ -88,12 +88,12 @@ function categoriesadmin_prepare_head()
 	// Entries must be declared in modules descriptor with line
 	// $this->tabs = array('entity:+tabname:Title:@mymodule:/mymodule/mypage.php?id=__ID__');   to add new tab
 	// $this->tabs = array('entity:-tabname);   												to remove a tab
-	complete_head_from_modules($conf,$langs,$object,$head,$h,'categoriesadmin');
+	complete_head_from_modules($conf,$langs,null,$head,$h,'categoriesadmin');
 
-	complete_head_from_modules($conf,$langs,$object,$head,$h,'categoriesadmin','remove');
+	complete_head_from_modules($conf,$langs,null,$head,$h,'categoriesadmin','remove');
 
 	return $head;
 }
 
 
-?>
\ No newline at end of file
+?>