diff --git a/discord/member.py b/discord/member.py
index b2eb9db91..b3961cf27 100644
--- a/discord/member.py
+++ b/discord/member.py
@@ -210,13 +210,7 @@ class Member(discord.abc.Messageable, _BaseUser):
     def _update_roles(self, data):
         self._roles = utils.SnowflakeList(map(int, data['roles']))
 
-    def _update(self, data, user=None):
-        if user:
-            self._user.name = user['username']
-            self._user.discriminator = user['discriminator']
-            self._user.avatar = user['avatar']
-            self._user.bot = user.get('bot', False)
-
+    def _update(self, data):
         # the nickname change is optional,
         # if it isn't in the payload then it didn't change
         try:
diff --git a/discord/state.py b/discord/state.py
index 11c586125..ab3f2ac7b 100644
--- a/discord/state.py
+++ b/discord/state.py
@@ -604,7 +604,7 @@ class ConnectionState:
         member = guild.get_member(user_id)
         if member is not None:
             old_member = copy.copy(member)
-            member._update(data, user)
+            member._update(data)
             self.dispatch('member_update', old_member, member)
         else:
             log.warning('GUILD_MEMBER_UPDATE referencing an unknown member ID: %s. Discarding.', user_id)