diff --git a/libratbox/src/epoll.c b/libratbox/src/epoll.c
index 480ceed08..4f6b13e3d 100644
--- a/libratbox/src/epoll.c
+++ b/libratbox/src/epoll.c
@@ -405,7 +405,7 @@ rb_epoll_sched_event_signalfd(struct ev_entry *event, int when)
 	struct sigevent ev;
 	struct itimerspec ts;
 
-	memset(&ev, 0, sizeof(&ev));
+	memset(&ev, 0, sizeof(ev));
 	event->comm_ptr = rb_malloc(sizeof(timer_t));
 	id = event->comm_ptr;
 	ev.sigev_notify = SIGEV_SIGNAL;
diff --git a/libratbox/src/sigio.c b/libratbox/src/sigio.c
index d63bffce5..2419dd813 100644
--- a/libratbox/src/sigio.c
+++ b/libratbox/src/sigio.c
@@ -412,7 +412,7 @@ rb_sigio_sched_event(struct ev_entry *event, int when)
 	if(can_do_event <= 0)
 		return 0;
 
-	memset(&ev, 0, sizeof(&ev));
+	memset(&ev, 0, sizeof(ev));
 	event->comm_ptr = rb_malloc(sizeof(timer_t));
 	id = event->comm_ptr;
 	ev.sigev_notify = SIGEV_SIGNAL;