diff --git a/py/objexcept.c b/py/objexcept.c
index 47debb44f8..ff7360c85c 100644
--- a/py/objexcept.c
+++ b/py/objexcept.c
@@ -404,8 +404,10 @@ MP_DEFINE_EXCEPTION(Exception, BaseException)
     /*
     MP_DEFINE_EXCEPTION(BlockingIOError, OSError)
     MP_DEFINE_EXCEPTION(ChildProcessError, OSError)
+    */
     MP_DEFINE_EXCEPTION(ConnectionError, OSError)
       MP_DEFINE_EXCEPTION(BrokenPipeError, ConnectionError)
+    /*
       MP_DEFINE_EXCEPTION(ConnectionAbortedError, ConnectionError)
       MP_DEFINE_EXCEPTION(ConnectionRefusedError, ConnectionError)
       MP_DEFINE_EXCEPTION(ConnectionResetError, ConnectionError)
@@ -414,7 +416,9 @@ MP_DEFINE_EXCEPTION(Exception, BaseException)
     MP_DEFINE_EXCEPTION(NotADirectoryError, OSError)
     MP_DEFINE_EXCEPTION(PermissionError, OSError)
     MP_DEFINE_EXCEPTION(ProcessLookupError, OSError)
+    */
     MP_DEFINE_EXCEPTION(TimeoutError, OSError)
+    /*
     MP_DEFINE_EXCEPTION(FileExistsError, OSError)
     MP_DEFINE_EXCEPTION(FileNotFoundError, OSError)
     MP_DEFINE_EXCEPTION(ReferenceError, Exception)