diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index a1ab5f9aa..e234d6009 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -6544,8 +6544,10 @@ internalLinkTypeBotStartInGroup bot_username:string start_parameter:string admin
 //@link_name Name of the link
 internalLinkTypeBusinessChat link_name:string = InternalLinkType;
 
-//@description The link is a link to the Telegram Star purchase section of the application @star_count The number of Telegram Stars that must be purchased by the user
-internalLinkTypeBuyStars star_count:int53 = InternalLinkType;
+//@description The link is a link to the Telegram Star purchase section of the application
+//@star_count The number of Telegram Stars that must be owned by the user
+//@purpose Purpose of Telegram Star purchase. Arbitrary string specified by the server, for example, "subs" if the Telegram Stars are required to extend channel subscriptions
+internalLinkTypeBuyStars star_count:int53 purpose:string = InternalLinkType;
 
 //@description The link is a link to the change phone number section of the application
 internalLinkTypeChangePhoneNumber = InternalLinkType;
diff --git a/td/telegram/LinkManager.cpp b/td/telegram/LinkManager.cpp
index 0fd073f82..df50d40b4 100644
--- a/td/telegram/LinkManager.cpp
+++ b/td/telegram/LinkManager.cpp
@@ -399,14 +399,15 @@ class LinkManager::InternalLinkBusinessChat final : public InternalLink {
 
 class LinkManager::InternalLinkBuyStars final : public InternalLink {
   int64 star_count_;
+  string purpose_;
 
   td_api::object_ptr<td_api::InternalLinkType> get_internal_link_type_object() const final {
-    return td_api::make_object<td_api::internalLinkTypeBuyStars>(star_count_);
+    return td_api::make_object<td_api::internalLinkTypeBuyStars>(star_count_, purpose_);
   }
 
  public:
-  explicit InternalLinkBuyStars(int64 star_count)
-      : star_count_(clamp(star_count, static_cast<int64>(1), static_cast<int64>(1000000000000))) {
+  explicit InternalLinkBuyStars(int64 star_count, const string &purpose)
+      : star_count_(clamp(star_count, static_cast<int64>(1), static_cast<int64>(1000000000000))), purpose_(purpose) {
   }
 };
 
@@ -1559,9 +1560,10 @@ unique_ptr<LinkManager::InternalLink> LinkManager::parse_tg_link_query(Slice que
     // msg_url?url=<url>&text=<text>
     return get_internal_link_message_draft(get_arg("url"), get_arg("text"));
   } else if (path.size() == 1 && path[0] == "stars_topup") {
-    // stars_topup?amount=<star_count>
-    if (has_arg("amount")) {
-      return td::make_unique<InternalLinkBuyStars>(to_integer<int64>(url_query.get_arg("amount")));
+    // stars_topup?balance=<star_count>&purpose=<purpose>
+    if (has_arg("balance")) {
+      return td::make_unique<InternalLinkBuyStars>(to_integer<int64>(url_query.get_arg("balance")),
+                                                   url_query.get_arg("purpose").str());
     }
   }
   if (!path.empty() && !path[0].empty()) {
@@ -2121,7 +2123,7 @@ Result<string> LinkManager::get_internal_link_impl(const td_api::InternalLinkTyp
       if (link->star_count_ <= 0) {
         return Status::Error(400, "Invalid Telegram Star number provided");
       }
-      return PSTRING() << "tg://stars_topup?amount=" << link->star_count_;
+      return PSTRING() << "tg://stars_topup?balance=" << link->star_count_ << "&purpose=" << url_encode(link->purpose_);
     }
     case td_api::internalLinkTypeChangePhoneNumber::ID:
       if (!is_internal) {
diff --git a/test/link.cpp b/test/link.cpp
index 3be35ff63..4225a2379 100644
--- a/test/link.cpp
+++ b/test/link.cpp
@@ -224,8 +224,8 @@ static auto business_chat(const td::string &link_name) {
   return td::td_api::make_object<td::td_api::internalLinkTypeBusinessChat>(link_name);
 }
 
-static auto buy_stars(td::int64 star_count) {
-  return td::td_api::make_object<td::td_api::internalLinkTypeBuyStars>(star_count);
+static auto buy_stars(td::int64 star_count, const td::string &purpose) {
+  return td::td_api::make_object<td::td_api::internalLinkTypeBuyStars>(star_count, purpose);
 }
 
 static auto change_phone_number() {
@@ -1332,10 +1332,10 @@ TEST(Link, parse_internal_link_part4) {
   parse_internal_link("tg://settings/privacy", privacy_and_security_settings());
 
   parse_internal_link("tg://stars_topup", unknown_deep_link("tg://stars_topup"));
-  parse_internal_link("tg://stars_topup?amount=", unknown_deep_link("tg://stars_topup?amount="));
-  parse_internal_link("tg://stars_topup?amount=test", buy_stars(1));
-  parse_internal_link("tg://stars_topup?amount=10", buy_stars(10));
-  parse_internal_link("tg://stars_topup?amount=100000000000", buy_stars(100000000000));
+  parse_internal_link("tg://stars_topup?balance=", unknown_deep_link("tg://stars_topup?balance="));
+  parse_internal_link("tg://stars_topup?balance=test", buy_stars(1, ""));
+  parse_internal_link("tg://stars_topup?balance=10&purpose=%30test", buy_stars(10, "0test"));
+  parse_internal_link("tg://stars_topup?balance=100000000000&purpose=subs", buy_stars(100000000000, "subs"));
 
   parse_internal_link("username.t.me////0/a//s/as?start=", bot_start("username", ""));
   parse_internal_link("username.t.me?start=as", bot_start("username", "as"));