1 files changed, 1 insertions, 0 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index b815c3f935..e77e3d609f 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -182,6 +182,7 @@ sock_new(class, fd)
     fp->f = rb_fdopen(fd, "r");
 #ifdef NT
     fp->finalize = sock_finalize;
+    fd = myfddup(fd);
 #else
     fd = dup(fd);
 #endif