diff --git a/td/telegram/SecretChatActor.cpp b/td/telegram/SecretChatActor.cpp
index abbaf419..db7535bd 100644
--- a/td/telegram/SecretChatActor.cpp
+++ b/td/telegram/SecretChatActor.cpp
@@ -1710,6 +1710,9 @@ void SecretChatActor::on_outbound_outer_send_message_promise(uint64 state_id, Pr
   promise.set_value(Unit());  // Seems like this message is at least stored to binlog already
   if (state->send_result_) {
     state->send_result_({});
+  } else {
+    context_->on_send_message_error(state->message->random_id, Status::Error(400, "Message has already been sent"),
+                                    Auto());
   }
 }