diff --git a/lib/windows/winlean.nim b/lib/windows/winlean.nim
index 750c7b4d16..645ccd57bd 100644
--- a/lib/windows/winlean.nim
+++ b/lib/windows/winlean.nim
@@ -518,6 +518,8 @@ var
   SO_DEBUG* {.importc, header: "winsock2.h".}: cint ## turn on debugging info recording
   SO_ACCEPTCONN* {.importc, header: "winsock2.h".}: cint # socket has had listen()
   SO_REUSEADDR* {.importc, header: "winsock2.h".}: cint # allow local address reuse
+  SO_REUSEPORT* {.importc: "SO_REUSEADDR", header: "winsock2.h".}: cint # allow port reuse. Since Windows does not really support it, mapped to SO_REUSEADDR. This shouldn't cause problems.
+
   SO_KEEPALIVE* {.importc, header: "winsock2.h".}: cint # keep connections alive
   SO_DONTROUTE* {.importc, header: "winsock2.h".}: cint # just use interface addresses
   SO_BROADCAST* {.importc, header: "winsock2.h".}: cint # permit sending of broadcast msgs