Index: libcfa/src/concurrency/kernel/private.hfa
===================================================================
--- libcfa/src/concurrency/kernel/private.hfa	(revision 8b74fa74db327a2cce113add048683b58496f6f5)
+++ libcfa/src/concurrency/kernel/private.hfa	(revision be5f0a5b61b342b82e129e15c445f0be776c76d2)
@@ -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
 
 //-----------------------------------------------------------------------------