diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index 90d74d4b3703bc8ed927c7d0ced77242fcc10f0f..0c012fc8cc3aa9a0707c2e12aeeb580768de2431 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -10892,6 +10892,7 @@ fn fileWriteStreaming(
                     .PIPE => return error.BrokenPipe,
                     .CONNRESET => |err| return errnoBug(err), // Not a socket handle.
                     .BUSY => return error.DeviceBusy,
+                    .ACCES => return error.AccessDenied,
                     else => |err| return posix.unexpectedErrno(err),
                 }
             },