1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/os.py b/Lib/os.py
index 55e7fc2..c7abc2a 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -533,7 +533,8 @@ if supports_bytes_environ:
         The optional second argument can specify an alternate default.
         key, default and the result are bytes."""
         return environb.get(key, default)
-    __all__.append("getenvb")
+
+    __all__.extend(("environb", "getenvb"))
 
 def fsencode(value):
     """Encode value for use in the file system, environment variables