1 files changed, 1 insertions, 1 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 65e7d9827f..e52ec9493a 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -241,7 +241,7 @@ init_sock(VALUE sock, int fd)
     MakeOpenFile(sock, fp);
     fp->fd = fd;
     fp->mode = FMODE_READWRITE|FMODE_DUPLEX;
-    rb_io_binmode(sock);
+    rb_io_ascii8bit_binmode(sock);
     if (do_not_reverse_lookup) {
 	fp->mode |= FMODE_NOREVLOOKUP;
     }