Index: kernel/generic/src/proc/thread.c
===================================================================
--- kernel/generic/src/proc/thread.c	(revision 7c3fb9bd77e4d2f6c10517a052e567f176fa91ee)
+++ kernel/generic/src/proc/thread.c	(revision 6e569bf0a1ed0572a905d116f5a08b3ebd525710)
@@ -383,4 +383,5 @@
 	timeout_initialize(&thread->sleep_timeout);
 	thread->sleep_interruptible = false;
+	thread->sleep_composable = false;
 	thread->sleep_queue = NULL;
 	thread->timeout_pending = false;