Index: libcfa/src/concurrency/kernel/private.hfa
===================================================================
--- libcfa/src/concurrency/kernel/private.hfa	(revision 8b74fa74db327a2cce113add048683b58496f6f5)
+++ libcfa/src/concurrency/kernel/private.hfa	(revision 2856982c6db55f1fdfb3012b77b490d999668ae8)
@@ -166,4 +166,5 @@
 #define TICKET_RUNNING ( 0) // thread is running
 #define TICKET_UNBLOCK ( 1) // thread should ignore next block
+#define TICKET_DEAD    (0xDEAD) // thread should never be unparked
 
 //-----------------------------------------------------------------------------