diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index c9c532d..9a37c541 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -29,6 +29,7 @@
 void xen_setup_runstate_info(int cpu);
 void xen_time_setup_guest(void);
 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
+u64 xen_steal_clock(int cpu);
 
 int xen_setup_shutdown_event(void);