1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index 794f6de60b..a6f323e816 100644
--- a/io.c
+++ b/io.c
@@ -155,7 +155,7 @@ void
 rb_update_max_fd(int fd)
 {
     struct stat buf;
-    if (fstat(fd, &buf) != 0) {
+    if (fstat(fd, &buf) != 0 && errno == EBADF) {
         rb_bug("rb_update_max_fd: invalid fd (%d) given.", fd);
     }
     if (max_file_descriptor < fd) max_file_descriptor = fd;