diff --git a/pipe_io_server/pipe_writer_thread.py b/pipe_io_server/pipe_writer_thread.py
index 822c868..b8e217f 100644
--- a/pipe_io_server/pipe_writer_thread.py
+++ b/pipe_io_server/pipe_writer_thread.py
@@ -43,6 +43,6 @@ class PipeWriterThread(Thread):
 
     def _unblock(self):
         self._write_queue.push_front(None)
-        with suppress(OSError):
+        with suppress(OSError, TypeError):
             while read(self._drain_fd, 65536):
                 pass