diff --git a/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp b/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp
index 6a60fe641..73ff07e32 100644
--- a/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp
@@ -329,15 +329,21 @@ Main::Session &AddSpecialBoxController::session() const {
 }
 
 void AddSpecialBoxController::subscribeToMigration() {
+	const auto chat = _peer->asChat();
+	if (!chat) {
+		return;
+	}
 	SubscribeToMigration(
-		_peer,
+		chat,
 		lifetime(),
-		[=](not_null<ChannelData*> channel) { migrate(channel); });
+		[=](not_null<ChannelData*> channel) { migrate(chat, channel); });
 }
 
-void AddSpecialBoxController::migrate(not_null<ChannelData*> channel) {
+void AddSpecialBoxController::migrate(
+		not_null<ChatData*> chat,
+		not_null<ChannelData*> channel) {
 	_peer = channel;
-	_additional.migrate(channel);
+	_additional.migrate(chat, channel);
 }
 
 std::unique_ptr<PeerListRow> AddSpecialBoxController::createSearchRow(
diff --git a/Telegram/SourceFiles/boxes/peers/add_participants_box.h b/Telegram/SourceFiles/boxes/peers/add_participants_box.h
index 8098134b7..ee626f161 100644
--- a/Telegram/SourceFiles/boxes/peers/add_participants_box.h
+++ b/Telegram/SourceFiles/boxes/peers/add_participants_box.h
@@ -121,7 +121,7 @@ private:
 	std::unique_ptr<PeerListRow> createRow(not_null<UserData*> user) const;
 
 	void subscribeToMigration();
-	void migrate(not_null<ChannelData*> channel);
+	void migrate(not_null<ChatData*> chat, not_null<ChannelData*> channel);
 
 	not_null<PeerData*> _peer;
 	MTP::Sender _api;
diff --git a/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp
index df67a6255..1ea91afc5 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp
@@ -208,10 +208,10 @@ EditAdminBox::EditAdminBox(
 , _oldRank(rank) {
 }
 
-MTPChatAdminRights EditAdminBox::Defaults(not_null<PeerData*> peer) {
-	const auto defaultRights = peer->isChat()
-		? ChatData::DefaultAdminRights()
-		: peer->isMegagroup()
+MTPChatAdminRights EditAdminBox::defaultRights() const {
+	const auto flags = peer()->isChat()
+		? peer()->asChat()->defaultAdminRights(user())
+		: peer()->isMegagroup()
 		? (Flag::f_change_info
 			| Flag::f_delete_messages
 			| Flag::f_ban_users
@@ -223,7 +223,7 @@ MTPChatAdminRights EditAdminBox::Defaults(not_null<PeerData*> peer) {
 			| Flag::f_edit_messages
 			| Flag::f_delete_messages
 			| Flag::f_invite_users);
-	return MTP_chatAdminRights(MTP_flags(defaultRights));
+	return MTP_chatAdminRights(MTP_flags(flags));
 }
 
 void EditAdminBox::prepare() {
@@ -242,7 +242,7 @@ void EditAdminBox::prepare() {
 
 	const auto chat = peer()->asChat();
 	const auto channel = peer()->asChannel();
-	const auto prepareRights = hadRights ? _oldRights : Defaults(peer());
+	const auto prepareRights = hadRights ? _oldRights : defaultRights();
 	const auto disabledByDefaults = (channel && !channel->isMegagroup())
 		? MTPDchatAdminRights::Flags(0)
 		: DisabledByDefaultRestrictions(peer());
@@ -264,12 +264,12 @@ void EditAdminBox::prepare() {
 			result.emplace(
 				disabledByDefaults,
 				tr::lng_rights_permission_for_all(tr::now));
-			if (const auto channel = peer()->asChannel()) {
-				if (amCreator() && user()->isSelf()) {
-					result.emplace(
-						~Flag::f_anonymous,
-						tr::lng_rights_permission_cant_edit(tr::now));
-				} else if (!channel->amCreator()) {
+			if (amCreator() && user()->isSelf()) {
+				result.emplace(
+					~Flag::f_anonymous,
+					tr::lng_rights_permission_cant_edit(tr::now));
+			} else if (const auto channel = peer()->asChannel()) {
+				if (!channel->amCreator()) {
 					result.emplace(
 						~channel->adminRights(),
 						tr::lng_rights_permission_cant_edit(tr::now));
@@ -611,9 +611,9 @@ void EditRestrictedBox::prepare() {
 	const auto defaultRestrictions = chat
 		? chat->defaultRestrictions()
 		: channel->defaultRestrictions();
-	const auto prepareRights = (_oldRights.c_chatBannedRights().vflags().v
+	const auto prepareRights = _oldRights.c_chatBannedRights().vflags().v
 		? _oldRights
-		: Defaults(peer()));
+		: defaultRights();
 	const auto prepareFlags = FixDependentRestrictions(
 		prepareRights.c_chatBannedRights().vflags().v
 		| defaultRestrictions
@@ -680,7 +680,7 @@ void EditRestrictedBox::prepare() {
 	}
 }
 
-MTPChatBannedRights EditRestrictedBox::Defaults(not_null<PeerData*> peer) {
+MTPChatBannedRights EditRestrictedBox::defaultRights() const {
 	return MTP_chatBannedRights(MTP_flags(0), MTP_int(0));
 }
 
diff --git a/Telegram/SourceFiles/boxes/peers/edit_participant_box.h b/Telegram/SourceFiles/boxes/peers/edit_participant_box.h
index 371d7b98b..474c166c1 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_participant_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_participant_box.h
@@ -89,7 +89,7 @@ private:
 	using Flag = MTPDchatAdminRights::Flag;
 	using Flags = MTPDchatAdminRights::Flags;
 
-	static MTPChatAdminRights Defaults(not_null<PeerData*> peer);
+	[[nodiscard]] MTPChatAdminRights defaultRights() const;
 
 	not_null<Ui::InputField*> addRankInput();
 	void transferOwnership();
@@ -144,7 +144,7 @@ private:
 	using Flag = MTPDchatBannedRights::Flag;
 	using Flags = MTPDchatBannedRights::Flags;
 
-	static MTPChatBannedRights Defaults(not_null<PeerData*> peer);
+	[[nodiscard]] MTPChatBannedRights defaultRights() const;
 
 	bool canSave() const {
 		return !!_saveCallback;
diff --git a/Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp
index 4adf4993f..f777344c0 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp
@@ -224,7 +224,7 @@ Fn<void(
 					const MTPDchatAdminRights &data) {
 				return data.vflags().v;
 			});
-			if (flags == ChatData::DefaultAdminRights() && rank.isEmpty()) {
+			if (flags == chat->defaultAdminRights(user) && rank.isEmpty()) {
 				saveChatAdmin(true);
 			} else if (!flags) {
 				saveChatAdmin(false);
@@ -370,7 +370,7 @@ auto ParticipantsAdditionalData::adminRights(
 	if (const auto chat = _peer->asChat()) {
 		return _admins.contains(user)
 			? std::make_optional(MTPChatAdminRights(MTP_chatAdminRights(
-				MTP_flags(ChatData::DefaultAdminRights()))))
+				MTP_flags(chat->defaultAdminRights(user)))))
 			: std::nullopt;
 	}
 	const auto i = _adminRights.find(user);
@@ -671,14 +671,16 @@ UserData *ParticipantsAdditionalData::applyBanned(
 	return user;
 }
 
-void ParticipantsAdditionalData::migrate(not_null<ChannelData*> channel) {
+void ParticipantsAdditionalData::migrate(
+		not_null<ChatData*> chat,
+		not_null<ChannelData*> channel) {
 	_peer = channel;
 	fillFromChannel(channel);
 
 	for (const auto user : _admins) {
 		_adminRights.emplace(
 			user,
-			MTP_chatAdminRights(MTP_flags(ChatData::DefaultAdminRights())));
+			MTP_chatAdminRights(MTP_flags(chat->defaultAdminRights(user))));
 		if (channel->amCreator()) {
 			_adminCanEdit.emplace(user);
 		}
@@ -1889,15 +1891,21 @@ void ParticipantsBoxController::refreshCustomStatus(
 }
 
 void ParticipantsBoxController::subscribeToMigration() {
+	const auto chat = _peer->asChat();
+	if (!chat) {
+		return;
+	}
 	SubscribeToMigration(
-		_peer,
+		chat,
 		lifetime(),
-		[=](not_null<ChannelData*> channel) { migrate(channel); });
+		[=](not_null<ChannelData*> channel) { migrate(chat, channel); });
 }
 
-void ParticipantsBoxController::migrate(not_null<ChannelData*> channel) {
+void ParticipantsBoxController::migrate(
+		not_null<ChatData*> chat,
+		not_null<ChannelData*> channel) {
 	_peer = channel;
-	_additional.migrate(channel);
+	_additional.migrate(chat, channel);
 	subscribeToCreatorChange(channel);
 }
 
diff --git a/Telegram/SourceFiles/boxes/peers/edit_participants_box.h b/Telegram/SourceFiles/boxes/peers/edit_participants_box.h
index dfcb1ae6d..cff017b31 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_participants_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_participants_box.h
@@ -101,7 +101,7 @@ public:
 	[[nodiscard]] UserData *adminPromotedBy(not_null<UserData*> user) const;
 	[[nodiscard]] UserData *restrictedBy(not_null<UserData*> user) const;
 
-	void migrate(not_null<ChannelData*> channel);
+	void migrate(not_null<ChatData*> chat, not_null<ChannelData*> channel);
 
 private:
 	UserData *applyCreator(const MTPDchannelParticipantCreator &data);
@@ -242,7 +242,7 @@ private:
 	void recomputeTypeFor(not_null<UserData*> user);
 
 	void subscribeToMigration();
-	void migrate(not_null<ChannelData*> channel);
+	void migrate(not_null<ChatData*> chat, not_null<ChannelData*> channel);
 	void subscribeToCreatorChange(not_null<ChannelData*> channel);
 	void fullListRefresh();
 
diff --git a/Telegram/SourceFiles/data/data_chat.cpp b/Telegram/SourceFiles/data/data_chat.cpp
index 8f4f29659..b0ec13d23 100644
--- a/Telegram/SourceFiles/data/data_chat.cpp
+++ b/Telegram/SourceFiles/data/data_chat.cpp
@@ -48,14 +48,17 @@ void ChatData::setPhoto(PhotoId photoId, const MTPChatPhoto &photo) {
 	});
 }
 
-auto ChatData::DefaultAdminRights() -> AdminRights {
+auto ChatData::defaultAdminRights(not_null<UserData*> user) -> AdminRights {
+	const auto isCreator = (creator == user->bareId())
+		|| (user->isSelf() && amCreator());
 	using Flag = AdminRight;
 	return Flag::f_change_info
 		| Flag::f_delete_messages
 		| Flag::f_ban_users
 		| Flag::f_invite_users
 		| Flag::f_pin_messages
-		| Flag::f_manage_call;
+		| Flag::f_manage_call
+		| (isCreator ? Flag::f_add_admins : Flag(0));
 }
 
 bool ChatData::canWrite() const {
@@ -335,7 +338,7 @@ void ApplyChatUpdate(
 	}
 	if (user->isSelf()) {
 		chat->setAdminRights(MTP_chatAdminRights(mtpIsTrue(update.vis_admin())
-			? MTP_flags(ChatData::DefaultAdminRights())
+			? MTP_flags(chat->defaultAdminRights(user))
 			: MTP_flags(0)));
 	}
 	if (mtpIsTrue(update.vis_admin())) {
@@ -457,7 +460,7 @@ void ApplyChatUpdate(
 				chat->admins.emplace(user);
 				if (user->isSelf()) {
 					chat->setAdminRights(MTP_chatAdminRights(
-						MTP_flags(ChatData::DefaultAdminRights())));
+						MTP_flags(chat->defaultAdminRights(user))));
 				}
 			}, [](const MTPDchatParticipant &) {
 			});
diff --git a/Telegram/SourceFiles/data/data_chat.h b/Telegram/SourceFiles/data/data_chat.h
index 52cc3e1de..d1c5d4343 100644
--- a/Telegram/SourceFiles/data/data_chat.h
+++ b/Telegram/SourceFiles/data/data_chat.h
@@ -45,7 +45,7 @@ public:
 	void setName(const QString &newName);
 
 	void invalidateParticipants();
-	bool noParticipantInfo() const {
+	[[nodiscard]] bool noParticipantInfo() const {
 		return (count > 0 || amIn()) && participants.empty();
 	}
 
@@ -58,10 +58,10 @@ public:
 	void removeFlags(MTPDchat::Flags which) {
 		_flags.remove(which);
 	}
-	auto flags() const {
+	[[nodiscard]] auto flags() const {
 		return _flags.current();
 	}
-	auto flagsValue() const {
+	[[nodiscard]] auto flagsValue() const {
 		return _flags.value();
 	}
 
@@ -74,58 +74,58 @@ public:
 	void removeFullFlags(MTPDchatFull::Flags which) {
 		_fullFlags.remove(which);
 	}
-	auto fullFlags() const {
+	[[nodiscard]] auto fullFlags() const {
 		return _fullFlags.current();
 	}
-	auto fullFlagsValue() const {
+	[[nodiscard]] auto fullFlagsValue() const {
 		return _fullFlags.value();
 	}
 
-	auto adminRights() const {
+	[[nodiscard]] auto adminRights() const {
 		return _adminRights.current();
 	}
-	auto adminRightsValue() const {
+	[[nodiscard]] auto adminRightsValue() const {
 		return _adminRights.value();
 	}
 	void setAdminRights(const MTPChatAdminRights &rights);
-	bool hasAdminRights() const {
+	[[nodiscard]] bool hasAdminRights() const {
 		return (adminRights() != 0);
 	}
 
-	auto defaultRestrictions() const {
+	[[nodiscard]] auto defaultRestrictions() const {
 		return _defaultRestrictions.current();
 	}
-	auto defaultRestrictionsValue() const {
+	[[nodiscard]] auto defaultRestrictionsValue() const {
 		return _defaultRestrictions.value();
 	}
 	void setDefaultRestrictions(const MTPChatBannedRights &rights);
 
-	bool isForbidden() const {
+	[[nodiscard]] bool isForbidden() const {
 		return flags() & MTPDchat_ClientFlag::f_forbidden;
 	}
-	bool amIn() const {
+	[[nodiscard]] bool amIn() const {
 		return !isForbidden()
 			&& !isDeactivated()
 			&& !haveLeft()
 			&& !wasKicked();
 	}
-	bool haveLeft() const {
+	[[nodiscard]] bool haveLeft() const {
 		return flags() & MTPDchat::Flag::f_left;
 	}
-	bool wasKicked() const {
+	[[nodiscard]] bool wasKicked() const {
 		return flags() & MTPDchat::Flag::f_kicked;
 	}
-	bool amCreator() const {
+	[[nodiscard]] bool amCreator() const {
 		return flags() & MTPDchat::Flag::f_creator;
 	}
-	bool isDeactivated() const {
+	[[nodiscard]] bool isDeactivated() const {
 		return flags() & MTPDchat::Flag::f_deactivated;
 	}
-	bool isMigrated() const {
+	[[nodiscard]] bool isMigrated() const {
 		return flags() & MTPDchat::Flag::f_migrated_to;
 	}
 
-	static AdminRights DefaultAdminRights();
+	[[nodiscard]] AdminRights defaultAdminRights(not_null<UserData*> user);
 
 	// Like in ChannelData.
 	bool canWrite() const;