diff --git a/src/include/lwip/sockets.h b/src/include/lwip/sockets.h
index 08de9455..eaf71434 100644
--- a/src/include/lwip/sockets.h
+++ b/src/include/lwip/sockets.h
@@ -490,12 +490,18 @@ typedef struct fd_set
 /* poll-related defines and types */
 /* @todo: find a better way to guard the definition of these defines and types if already defined */
 #if !defined(POLLIN) && !defined(POLLOUT)
-#define POLLIN   1
-#define POLLOUT  2
-#define POLLERR  4
-#define POLLNVAL 8
-/* No support for POLLPRI, POLLHUP, POLLMSG, POLLRDBAND, POLLWRBAND. */
-typedef int nfds_t;
+#define POLLIN     0x1
+#define POLLOUT    0x2
+#define POLLERR    0x4
+#define POLLNVAL   0x8
+/* Below values are unimplemented */
+#define POLLRDNORM 0x10
+#define POLLRDBAND 0x20
+#define POLLPRI    0x40
+#define POLLWRNORM 0x80
+#define POLLWRBAND 0x100
+#define POLLHUP    0x200
+typedef unsigned int nfds_t;
 struct pollfd
 {
   int fd;