diff --git a/tutorial/tutorial.wmml b/tutorial/tutorial.wmml
index bc175a200a0710b2524e4249b2365694f393eca8..06fe5070c4111616f9476c82c8b76873ff74cbeb 100644
--- a/tutorial/tutorial.wmml
+++ b/tutorial/tutorial.wmml
@@ -30,6 +30,7 @@ Write an appendix about old functions, behaviors and keywords.
 predef::m_delete-behavior is missing. - Fixed by hubbe
 
 Missing funktions in the manual: (tab before function means fixed)
+has_prefix (is it supposed be global, or perhaps String.has_prefix? /Noring)
 UNDEFINED
 ( Stdio.append_path FIXED! /Hedda)
 Array.transpose