diff --git a/source/mt_timer.c b/source/mt_timer.c
index cacf1a1..c01f18b 100644
--- a/source/mt_timer.c
+++ b/source/mt_timer.c
@@ -64,6 +64,8 @@ void timer_deinit(MT_TIMER_OBJECT *object)
     timer_add(object, &itimespec, 0, NULL, NULL, NULL);
     pthread_join(object->timer_thread_id, NULL);
     timer_clear(object);
+    close(object->timer_epoll_fd);
+    object->timer_epoll_fd = -1;
 }
 
 int timer_add(MT_TIMER_OBJECT *object, struct itimerspec *itimespec,