diff --git a/telethon/extensions/tcpclient.py b/telethon/extensions/tcpclient.py
index 716c4066..f24dec40 100644
--- a/telethon/extensions/tcpclient.py
+++ b/telethon/extensions/tcpclient.py
@@ -67,6 +67,7 @@ class TcpClient:
         if proxy is None:
             s = socket.socket(mode, socket.SOCK_STREAM)
         else:
+            __log__.info('Connection will be made through proxy %s', proxy)
             import socks
             s = socks.socksocket(mode, socket.SOCK_STREAM)
             if isinstance(proxy, dict):
diff --git a/telethon_generator/data/error_descriptions b/telethon_generator/data/error_descriptions
index 20c35c1b..0558e800 100644
--- a/telethon_generator/data/error_descriptions
+++ b/telethon_generator/data/error_descriptions
@@ -67,3 +67,4 @@ FLOOD_TEST_PHONE_WAIT_X=A wait of {} seconds is required in the test servers
 TAKEOUT_INIT_DELAY_X=A wait of {} seconds is required before being able to initiate the takeout
 CHAT_NOT_MODIFIED=The chat or channel wasn't modified (title, invites, username, admins, etc. are the same)
 URL_INVALID=The URL used was invalid (e.g. when answering a callback with an URL that's not t.me/yourbot or your game's URL)
+USER_NOT_PARTICIPANT=The target user is not a member of the specified megagroup or channel
diff --git a/telethon_generator/data/html/core.html b/telethon_generator/data/html/core.html
index aed00864..b55bb7de 100644
--- a/telethon_generator/data/html/core.html
+++ b/telethon_generator/data/html/core.html
@@ -149,7 +149,7 @@ users.getUsers#0d91a548 id:Vector&lt;InputUser&gt; = Vector&lt;User&gt;</pre>
     <li id="bool"><b>Bool</b>:
         Either <code>True</code> or <code>False</code>.
     </li>
-    <li id="true"><b>true</b>:
+    <li id="true"><b>flag</b>:
         These arguments aren't actually sent but rather encoded as flags.
         Any truthy value (<code>True</code>, <code>7</code>) will enable
         this flag, although it's recommended to use <code>True</code> or
diff --git a/telethon_generator/generators/docs.py b/telethon_generator/generators/docs.py
index 98d10b73..ecfdee66 100755
--- a/telethon_generator/generators/docs.py
+++ b/telethon_generator/generators/docs.py
@@ -188,7 +188,8 @@ def _get_description(arg):
         desc.append('If left unspecified, it will be inferred automatically.')
         otherwise = True
     elif arg.is_flag:
-        desc.append('This argument can be omitted.')
+        desc.append('This argument defaults to '
+                    '<code>None</code> and can be omitted.')
         otherwise = True
 
     if arg.type in {'InputPeer', 'InputUser', 'InputChannel'}:
@@ -370,11 +371,12 @@ def _write_html_pages(tlobjects, errors, layer, input_res, output_dir):
                                  bold=True)
 
                     # Type row
+                    friendly_type = 'flag' if arg.type == 'true' else arg.type
                     if arg.is_generic:
-                        docs.add_row('!' + arg.type, align='center')
+                        docs.add_row('!' + friendly_type, align='center')
                     else:
                         docs.add_row(
-                            arg.type, align='center', link=
+                            friendly_type, align='center', link=
                             path_for_type(arg.type, relative_to=filename)
                          )