diff --git a/include/sys/poll.h b/include/sys/poll.h
index b0b784d70c8..10c274c4625 100644
--- a/include/sys/poll.h
+++ b/include/sys/poll.h
@@ -74,6 +74,7 @@
 
 #define POLLERR      (0x08)
 #define POLLHUP      (0x10)
+#define POLLRDHUP    (0x10)
 #define POLLNVAL     (0x20)
 
 #define POLLFD       (0x00)