diff --git a/tutorial/tutorial.wmml b/tutorial/tutorial.wmml
index 6ce787e2f746da964be5275407afa8be90676be9..0c534661230cd3485d1e3e4c827fa4c9159ab984 100644
--- a/tutorial/tutorial.wmml
+++ b/tutorial/tutorial.wmml
@@ -27,6 +27,8 @@ Write an appendix about old functions, behaviors and keywords.
   ("How to convert from old versions of Pike")
 
 
+predef::m_delete-behavior is missing. 
+
 Missing funktions in the manual: (tab before function means fixed)
 UNDEFINED
 ( Stdio.append_path FIXED! /Hedda)