diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 7279b94..aa6ba44 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -321,7 +321,7 @@
 }
 
 
-extern void timekeeping_notify(struct clocksource *clock);
+extern int timekeeping_notify(struct clocksource *clock);
 
 extern cycle_t clocksource_mmio_readl_up(struct clocksource *);
 extern cycle_t clocksource_mmio_readl_down(struct clocksource *);