diff --git a/lib/std/os.zig b/lib/std/os.zig
index 0ee20d7c8e..5df2c441cd 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -1244,6 +1244,7 @@ pub fn openatZ(dir_fd: fd_t, file_path: [*:0]const u8, flags: u32, mode: mode_t)
 
             EFAULT => unreachable,
             EINVAL => unreachable,
+            EBADF => unreachable,
             EACCES => return error.AccessDenied,
             EFBIG => return error.FileTooBig,
             EOVERFLOW => return error.FileTooBig,