diff --git a/devpoll.c b/devpoll.c
index 513065ef..cbd27309 100644
--- a/devpoll.c
+++ b/devpoll.c
@@ -75,7 +75,7 @@ static int devpoll_del	(void *, struct event *);
 static int devpoll_dispatch	(struct event_base *, void *, struct timeval *);
 static void devpoll_dealloc	(struct event_base *, void *);
 
-struct eventop devpollops = {
+const struct eventop devpollops = {
 	"devpoll",
 	devpoll_init,
 	devpoll_add,
diff --git a/epoll.c b/epoll.c
index 3a445781..cf3c8593 100644
--- a/epoll.c
+++ b/epoll.c
@@ -75,7 +75,7 @@ static int epoll_del	(void *, struct event *);
 static int epoll_dispatch	(struct event_base *, void *, struct timeval *);
 static void epoll_dealloc	(struct event_base *, void *);
 
-struct eventop epollops = {
+const struct eventop epollops = {
 	"epoll",
 	epoll_init,
 	epoll_add,
diff --git a/event.c b/event.c
index 9d32203d..63802083 100644
--- a/event.c
+++ b/event.c
@@ -79,7 +79,7 @@ extern const struct eventop win32ops;
 #endif
 
 /* In order of preference */
-const struct eventop *eventops[] = {
+static const struct eventop *eventops[] = {
 #ifdef HAVE_EVENT_PORTS
 	&evportops,
 #endif