diff --git a/td/telegram/InputMessageText.cpp b/td/telegram/InputMessageText.cpp
index 81faa3e7b..4601234c1 100644
--- a/td/telegram/InputMessageText.cpp
+++ b/td/telegram/InputMessageText.cpp
@@ -61,7 +61,7 @@ Result<InputMessageText> process_input_message_text(const Td *td, DialogId dialo
   TRY_RESULT(text, get_formatted_text(td, dialog_id, std::move(input_message_text->text_), is_bot,
                                       for_draft || !web_page_url.empty(), for_draft, for_draft));
   if (!disable_web_page_preview && web_page_url.empty() && dialog_id.get_type() == DialogType::SecretChat) {
-    web_page_url = get_first_url(text);
+    web_page_url = get_first_url(text).str();
   }
   return InputMessageText{
       std::move(text),   std::move(web_page_url), disable_web_page_preview,        force_small_media,
diff --git a/td/telegram/MessageContent.cpp b/td/telegram/MessageContent.cpp
index 8d6515b67..c714b9c6d 100644
--- a/td/telegram/MessageContent.cpp
+++ b/td/telegram/MessageContent.cpp
@@ -2091,7 +2091,7 @@ InlineMessageContent create_inline_message_content(Td *td, FileId file_id,
       FormattedText text{std::move(inline_message->message_), std::move(entities)};
       WebPageId web_page_id;
       if (!result.disable_web_page_preview) {
-        web_page_id = td->web_pages_manager_->get_web_page_by_url(get_first_url(text));
+        web_page_id = td->web_pages_manager_->get_web_page_by_url(get_first_url(text).str());
       }
       result.message_content =
           td::make_unique<MessageText>(std::move(text), web_page_id, false, false, false, string());
@@ -2116,7 +2116,7 @@ InlineMessageContent create_inline_message_content(Td *td, FileId file_id,
 
       FormattedText text{std::move(inline_message->message_), std::move(entities)};
       WebPageId web_page_id =
-          td->web_pages_manager_->get_web_page_by_url(web_page_url.empty() ? get_first_url(text) : web_page_url);
+          td->web_pages_manager_->get_web_page_by_url(web_page_url.empty() ? get_first_url(text).str() : web_page_url);
       result.message_content = td::make_unique<MessageText>(
           std::move(text), web_page_id, inline_message->force_small_media_, inline_message->force_large_media_,
           inline_message->safe_, std::move(web_page_url));
@@ -2263,7 +2263,7 @@ static Result<InputMessageContent> create_input_message_content(
           td->contacts_manager_->get_channel_permissions(dialog_id.get_channel_id()).can_add_web_page_previews();
       if (!is_bot && !disable_web_page_preview && can_add_web_page_previews) {
         web_page_id = td->web_pages_manager_->get_web_page_by_url(
-            web_page_url.empty() ? get_first_url(input_message_text.text) : web_page_url);
+            web_page_url.empty() ? get_first_url(input_message_text.text).str() : web_page_url);
       }
       content = td::make_unique<MessageText>(std::move(input_message_text.text), web_page_id,
                                              input_message_text.force_small_media, input_message_text.force_large_media,
diff --git a/td/telegram/MessageEntity.cpp b/td/telegram/MessageEntity.cpp
index f3a4f5e07..626e79757 100644
--- a/td/telegram/MessageEntity.cpp
+++ b/td/telegram/MessageEntity.cpp
@@ -1785,7 +1785,7 @@ static bool is_plain_domain(Slice url) {
   return url.find('/') >= url.size() && url.find('?') >= url.size() && url.find('#') >= url.size();
 }
 
-string get_first_url(const FormattedText &text) {
+Slice get_first_url(const FormattedText &text) {
   for (auto &entity : text.entities) {
     switch (entity.type) {
       case MessageEntity::Type::Mention:
@@ -1803,7 +1803,7 @@ string get_first_url(const FormattedText &text) {
         if (scheme == "ton:" || begins_with(scheme, "tg:") || scheme == "ftp:" || is_plain_domain(url)) {
           continue;
         }
-        return url.str();
+        return url;
       }
       case MessageEntity::Type::EmailAddress:
         break;
@@ -1828,7 +1828,7 @@ string get_first_url(const FormattedText &text) {
         if (begins_with(url, "ton:") || begins_with(url, "tg:") || begins_with(url, "ftp:")) {
           continue;
         }
-        return url.str();
+        return url;
       }
       case MessageEntity::Type::MentionName:
         break;
@@ -1849,7 +1849,7 @@ string get_first_url(const FormattedText &text) {
     }
   }
 
-  return string();
+  return Slice();
 }
 
 bool is_visible_url(const FormattedText &text, const string &url) {
diff --git a/td/telegram/MessageEntity.h b/td/telegram/MessageEntity.h
index e20584d21..c25804726 100644
--- a/td/telegram/MessageEntity.h
+++ b/td/telegram/MessageEntity.h
@@ -185,7 +185,7 @@ void remove_empty_entities(vector<MessageEntity> &entities);
 
 void remove_unallowed_quote_entities(FormattedText &text);
 
-string get_first_url(const FormattedText &text);
+Slice get_first_url(const FormattedText &text);
 
 bool is_visible_url(const FormattedText &text, const string &url);
 
diff --git a/td/telegram/WebPagesManager.cpp b/td/telegram/WebPagesManager.cpp
index fe8b5c522..604b772cf 100644
--- a/td/telegram/WebPagesManager.cpp
+++ b/td/telegram/WebPagesManager.cpp
@@ -880,7 +880,7 @@ void WebPagesManager::get_web_page_preview(td_api::object_ptr<td_api::formattedT
       promise, formatted_text,
       get_formatted_text(td_, DialogId(), std::move(text), td_->auth_manager_->is_bot(), true, true, true));
 
-  auto first_url = get_first_url(formatted_text);
+  auto first_url = get_first_url(formatted_text).str();
   if (first_url.empty()) {
     return promise.set_value(nullptr);
   }