diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index 4e0897461..d2a12c406 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -686,7 +686,8 @@ check_file_descriptor(mrb_state *mrb, mrb_int fd)
 #endif /* _WIN32 */
 
   if (fstat(fdi, &sb) == 0) return;
-  if (errno != EBADF) return;
+  if (errno == EBADF) goto badfd;
+  return;
 
 badfd:
   mrb_sys_fail(mrb, "bad file descriptor");