diff --git a/youtube/comments.py b/youtube/comments.py
index e650a35..58a03ac 100644
--- a/youtube/comments.py
+++ b/youtube/comments.py
@@ -320,8 +320,8 @@ def comment_box_account_options():
 comment_box_template = Template('''
 <form action="$form_action" method="post" class="comment-form">
     <div id="comment-account-options">
-        <label for="username-selection">Account:</label>
-        <select id="username-selection" name="username">
+        <label for="account-selection">Account:</label>
+        <select id="account-selection" name="channel_id">
 $options
         </select>
         <a href="''' + common.URL_ORIGIN + '''/login" target="_blank">Add account</a>
diff --git a/youtube/post_comment.py b/youtube/post_comment.py
index dca8a1f..45e9f4b 100644
--- a/youtube/post_comment.py
+++ b/youtube/post_comment.py
@@ -108,8 +108,8 @@ def get_session_token(video_id, cookiejar):
         raise Exception("Couldn't find xsrf_token")
 
 def post_comment(parameters, fields):
-    username = fields['username'][0]
-    cookiejar = accounts.account_cookiejar(username)
+    channel_id = fields['channel_id'][0]
+    cookiejar = accounts.account_cookiejar(channel_id)
 
     #parameters = urllib.parse.parse_qs(query_string)
     try: