diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index d8eb6df98..9d4f52b09 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -12986,17 +12986,23 @@ bool ContactsManager::get_channel_has_linked_channel(const Channel *c) {
 }
 
 ChannelId ContactsManager::get_channel_linked_channel_id(ChannelId channel_id) {
-  auto channel_full = get_channel_full_force(channel_id, "get_channel_linked_channel_id");
+  auto channel_full = get_channel_full_const(channel_id);
   if (channel_full == nullptr) {
-    return ChannelId();
+    channel_full = get_channel_full_force(channel_id, "get_channel_linked_channel_id");
+    if (channel_full == nullptr) {
+      return ChannelId();
+    }
   }
   return channel_full->linked_channel_id;
 }
 
 int32 ContactsManager::get_channel_slow_mode_delay(ChannelId channel_id) {
-  auto channel_full = get_channel_full_force(channel_id, "get_channel_slow_mode_delay");
+  auto channel_full = get_channel_full_const(channel_id);
   if (channel_full == nullptr) {
-    return 0;
+    channel_full = get_channel_full_force(channel_id, "get_channel_slow_mode_delay");
+    if (channel_full == nullptr) {
+      return 0;
+    }
   }
   return channel_full->slow_mode_delay;
 }
@@ -13078,7 +13084,7 @@ void ContactsManager::reload_channel(ChannelId channel_id, Promise<Unit> &&promi
   td_->create_handler<GetChannelsQuery>(std::move(promise))->send(std::move(input_channel));
 }
 
-const ContactsManager::ChannelFull *ContactsManager::get_channel_full(ChannelId channel_id) const {
+const ContactsManager::ChannelFull *ContactsManager::get_channel_full_const(ChannelId channel_id) const {
   auto p = channels_full_.find(channel_id);
   if (p == channels_full_.end()) {
     return nullptr;
@@ -13087,6 +13093,10 @@ const ContactsManager::ChannelFull *ContactsManager::get_channel_full(ChannelId
   }
 }
 
+const ContactsManager::ChannelFull *ContactsManager::get_channel_full(ChannelId channel_id) const {
+  return get_channel_full_const(channel_id);
+}
+
 ContactsManager::ChannelFull *ContactsManager::get_channel_full(ChannelId channel_id, const char *source) {
   auto p = channels_full_.find(channel_id);
   if (p == channels_full_.end()) {
diff --git a/td/telegram/ContactsManager.h b/td/telegram/ContactsManager.h
index 57d546546..85a9a250e 100644
--- a/td/telegram/ContactsManager.h
+++ b/td/telegram/ContactsManager.h
@@ -1105,6 +1105,7 @@ class ContactsManager : public Actor {
   Channel *add_channel(ChannelId channel_id, const char *source);
 
   const ChannelFull *get_channel_full(ChannelId channel_id) const;
+  const ChannelFull *get_channel_full_const(ChannelId channel_id) const;
   ChannelFull *get_channel_full(ChannelId channel_id, const char *source);
   ChannelFull *get_channel_full_force(ChannelId channel_id, const char *source);