diff --git a/shadowsocks/obfsplugin/auth.py b/shadowsocks/obfsplugin/auth.py
index 19e8755..3d23a52 100644
--- a/shadowsocks/obfsplugin/auth.py
+++ b/shadowsocks/obfsplugin/auth.py
@@ -59,18 +59,12 @@ def create_auth_aes128_sha1(method):
 
 obfs_map = {
         'auth_sha1': (create_auth_sha1,),
-        'auth_sha1_compatible': (create_auth_sha1,),
         'auth_sha1_v2': (create_auth_sha1_v2,),
-        'auth_sha1_v2_compatible': (create_auth_sha1_v2,),
         'auth_sha1_v3': (create_auth_sha1_v3,),
-        'auth_sha1_v3_compatible': (create_auth_sha1_v3,),
         'auth_sha1_v4': (create_auth_sha1_v4,),
-        'auth_sha1_v4_compatible': (create_auth_sha1_v4,),
         'auth_aes128': (create_auth_aes128,),
         'auth_aes128_md5': (create_auth_aes128_md5,),
-        'auth_aes128_md5_compatible': (create_auth_aes128_md5,),
         'auth_aes128_sha1': (create_auth_aes128_sha1,),
-        'auth_aes128_sha1_compatible': (create_auth_aes128_sha1,),
 }
 
 def match_begin(str1, str2):