diff --git a/tdactor/CMakeLists.txt b/tdactor/CMakeLists.txt
index c399319db..c0c83025e 100644
--- a/tdactor/CMakeLists.txt
+++ b/tdactor/CMakeLists.txt
@@ -42,6 +42,7 @@ set(TDACTOR_TEST_SOURCE
   ${CMAKE_CURRENT_SOURCE_DIR}/test/actors_main.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/test/actors_simple.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/test/actors_workers.cpp
+  ${CMAKE_CURRENT_SOURCE_DIR}/test/actors_bugs.cpp
   PARENT_SCOPE
 )
 
diff --git a/tdactor/test/actors_bugs.cpp b/tdactor/test/actors_bugs.cpp
new file mode 100644
index 000000000..05c8d865d
--- /dev/null
+++ b/tdactor/test/actors_bugs.cpp
@@ -0,0 +1,49 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+#include "td/utils/tests.h"
+
+#include "td/actor/Timeout.h"
+
+using namespace td;
+
+TEST(MultiTimeout, bug) {
+  SET_VERBOSITY_LEVEL(VERBOSITY_NAME(DEBUG));
+
+  ConcurrentScheduler sched;
+  int threads_n = 0;
+  sched.init(threads_n);
+
+  sched.start();
+  std::unique_ptr<MultiTimeout> multi_timeout;
+  struct Data {
+    MultiTimeout *multi_timeout;
+  };
+  Data data;
+
+  {
+    auto guard = sched.get_current_guard();
+    multi_timeout = std::make_unique<MultiTimeout>();
+    data.multi_timeout = multi_timeout.get();
+    multi_timeout->set_callback([](void *void_data, int64 key) {
+      auto &data = *reinterpret_cast<Data *>(void_data);
+      if (key == 1) {
+        data.multi_timeout->cancel_timeout(key + 1);
+        data.multi_timeout->set_timeout_in(key + 2, 1);
+      } else {
+        Scheduler::instance()->finish();
+      }
+    });
+    multi_timeout->set_callback_data(&data);
+    multi_timeout->set_timeout_in(1, 1);
+    multi_timeout->set_timeout_in(2, 2);
+  }
+
+  while (sched.run_main(10)) {
+    // empty
+  }
+  sched.finish();
+}