diff --git a/include/epwakeup.h b/include/epwakeup.h
index fd97681..20aad5e 100644
--- a/include/epwakeup.h
+++ b/include/epwakeup.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003-2020 Ke Hengzhong <kehengzhong@hotmail.com>
+ * Copyright (c) 2003-2021 Ke Hengzhong <kehengzhong@hotmail.com>
  * All rights reserved. See MIT LICENSE for redistribution.
  */
 
@@ -16,8 +16,6 @@ int epcore_wakeup_clean (void * vpcore);
 int epcore_wakeup_send (void * vpcore);
 int epcore_wakeup_recv (void * vpcore);
 
-int epcore_wakeup_getmon (void * vpcore, void * veps);
-
 int epump_wakeup_init  (void * vepump);
 int epump_wakeup_clean (void * vepump);
 int epump_wakeup_send  (void * vepump);