1 files changed, 2 insertions, 1 deletions
diff --git a/ext/socket/basicsocket.c b/ext/socket/basicsocket.c
index 84ea2bb6bd..c1ae88d80c 100644
--- a/ext/socket/basicsocket.c
+++ b/ext/socket/basicsocket.c
@@ -558,7 +558,8 @@ rsock_bsock_send(int argc, VALUE *argv, VALUE sock)
     GetOpenFile(sock, fptr);
     arg.fd = fptr->fd;
     arg.flags = NUM2INT(flags);
-    while ((n = (int)BLOCKING_REGION_FD(func, &arg)) < 0) {
+    while (rb_thread_fd_writable(arg.fd),
+	   (n = (int)BLOCKING_REGION_FD(func, &arg)) < 0) {
 	if (rb_io_wait_writable(arg.fd)) {
 	    continue;
 	}