diff --git a/lib/thread.c b/lib/thread.c
index c140c7600c..761edcafd4 100644
--- a/lib/thread.c
+++ b/lib/thread.c
@@ -45,6 +45,16 @@ DEFINE_MTYPE_STATIC(LIB, THREAD_STATS, "Thread stats")
 
 DECLARE_LIST(thread_list, struct thread, threaditem)
 
+struct cancel_req {
+	int flags;
+	struct thread *thread;
+	void *eventobj;
+	struct thread **threadref;
+};
+
+/* Flags for task cancellation */
+#define THREAD_CANCEL_FLAG_READY     0x01
+
 static int thread_timer_cmp(const struct thread *a, const struct thread *b)
 {
 	if (a->u.sands.tv_sec < b->u.sands.tv_sec)
diff --git a/lib/thread.h b/lib/thread.h
index 6b510fc4c9..b30dd9a727 100644
--- a/lib/thread.h
+++ b/lib/thread.h
@@ -61,12 +61,6 @@ struct fd_handler {
 	nfds_t copycount;
 };
 
-struct cancel_req {
-	struct thread *thread;
-	void *eventobj;
-	struct thread **threadref;
-};
-
 struct xref_threadsched {
 	struct xref xref;