diff --git a/reactos/base/services/audiosrv/audiosrv.h b/reactos/base/services/audiosrv/audiosrv.h
index 39727b4a81b..72b236dfd98 100644
--- a/reactos/base/services/audiosrv/audiosrv.h
+++ b/reactos/base/services/audiosrv/audiosrv.h
@@ -56,6 +56,9 @@ ProcessDeviceArrival(DEV_BROADCAST_DEVICEINTERFACE* device);
 BOOL
 RegisterForDeviceNotifications();
 
+VOID
+UnregisterDeviceNotifications();
+
 DWORD
 HandleDeviceEvent(
     DWORD dwEventType,