diff --git a/include/proto/fd.h b/include/proto/fd.h
index be52612..9b4c632 100644
--- a/include/proto/fd.h
+++ b/include/proto/fd.h
@@ -53,7 +53,7 @@
 
 #define EV_FD_SET(fd, ev)    (cur_poller.set((fd), (ev)))
 #define EV_FD_CLR(fd, ev)    (cur_poller.clr((fd), (ev)))
-#define EV_FD_ISSET(fd, ev)  (cur_poller.isset((fd), (ev)))
+#define EV_FD_ISSET(fd, ev)  (cur_poller.is_set((fd), (ev)))
 #define EV_FD_COND_S(fd, ev) (cur_poller.cond_s((fd), (ev)))
 #define EV_FD_COND_C(fd, ev) (cur_poller.cond_c((fd), (ev)))
 #define EV_FD_REM(fd)        (cur_poller.rem(fd))