diff --git a/include/wepoll.h b/include/wepoll.h
index b003787..c6f12e2 100644
--- a/include/wepoll.h
+++ b/include/wepoll.h
@@ -24,18 +24,18 @@ enum EPOLL_EVENTS {
   EPOLLONESHOT = (int) (1U << 31)
 };
 
-#define EPOLLIN      ((uint32_t) EPOLLIN)
-#define EPOLLPRI     ((uint32_t) EPOLLPRI)
-#define EPOLLOUT     ((uint32_t) EPOLLOUT)
-#define EPOLLERR     ((uint32_t) EPOLLERR)
-#define EPOLLHUP     ((uint32_t) EPOLLHUP)
-#define EPOLLRDNORM  ((uint32_t) EPOLLRDNORM)
-#define EPOLLRDBAND  ((uint32_t) EPOLLRDBAND)
-#define EPOLLWRNORM  ((uint32_t) EPOLLWRNORM)
-#define EPOLLWRBAND  ((uint32_t) EPOLLWRBAND)
-#define EPOLLMSG     ((uint32_t) EPOLLMSG)
-#define EPOLLRDHUP   ((uint32_t) EPOLLRDHUP)
-#define EPOLLONESHOT ((uint32_t) EPOLLONESHOT)
+#define EPOLLIN      (1U <<  0)
+#define EPOLLPRI     (1U <<  1)
+#define EPOLLOUT     (1U <<  2)
+#define EPOLLERR     (1U <<  3)
+#define EPOLLHUP     (1U <<  4)
+#define EPOLLRDNORM  (1U <<  6)
+#define EPOLLRDBAND  (1U <<  7)
+#define EPOLLWRNORM  (1U <<  8)
+#define EPOLLWRBAND  (1U <<  9)
+#define EPOLLMSG     (1U << 10)
+#define EPOLLRDHUP   (1U << 13)
+#define EPOLLONESHOT (1U << 31)
 
 #define EPOLL_CTL_ADD 1
 #define EPOLL_CTL_MOD 2