diff --git a/win32port/win32helpers/websock-w32.h b/win32port/win32helpers/websock-w32.h
index 5d64dfd8..2d2bb4ae 100644
--- a/win32port/win32helpers/websock-w32.h
+++ b/win32port/win32helpers/websock-w32.h
@@ -19,6 +19,29 @@
 #define random rand
 #define usleep _sleep
 
+#ifdef  __MINGW64__                                                             
+#define DEF_POLL_STUFF
+#endif
+#ifdef  __MINGW32__                                                             
+#define DEF_POLL_STUFF
+#endif
+
+#ifdef DEF_POLL_STUFF
+
+typedef struct pollfd {
+	SOCKET fd;
+	short  events;
+	short  revents;
+} WSAPOLLFD, *PWSAPOLLFD, *LPWSAPOLLFD;
+
+#define POLLIN      0x0001      /* any readable data available   */
+#define POLLOUT     0x0004      /* file descriptor is writeable  */
+#define POLLERR     0x0008      /* some poll error occurred      */
+#define POLLHUP     0x0010      /* file descriptor was "hung up" */
+#define POLLNVAL    0x0020		/* requested events "invalid"    */
+
+#endif
+
 typedef INT (WSAAPI *PFNWSAPOLL)(LPWSAPOLLFD fdarray, ULONG nfds, INT timeout);
 extern PFNWSAPOLL poll;