diff --git a/CMakeLists.txt b/CMakeLists.txt
index fafb4830..9a004034 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -223,7 +223,7 @@ add_subdirectory(tdutils)
 add_subdirectory(td/generate)
 
 if (NOT CMAKE_CROSSCOMPILING)
-  add_custom_target(prepare_cross_compiling DEPENDS tl_generate_common tdmime_auto)
+  add_custom_target(prepare_cross_compiling DEPENDS tl_generate_common tdmime_auto tl_generate_json)
   if (TD_ENABLE_DOTNET)
     add_dependencies(prepare_cross_compiling generate_dotnet_api)
   endif()
diff --git a/tdutils/td/utils/logging.cpp b/tdutils/td/utils/logging.cpp
index f0e2927a..17403ff8 100644
--- a/tdutils/td/utils/logging.cpp
+++ b/tdutils/td/utils/logging.cpp
@@ -178,6 +178,7 @@ class DefaultLog : public LogInterface {
         emscripten_log(
             EM_LOG_ERROR | EM_LOG_CONSOLE | EM_LOG_C_STACK | EM_LOG_JS_STACK | EM_LOG_DEMANGLE | EM_LOG_FUNC_PARAMS,
             "%s", slice.c_str());
+        EM_ASM(throw(UTF8ToString($0)), slice.c_str());
         break;
       case VERBOSITY_NAME(ERROR):
         emscripten_log(EM_LOG_ERROR | EM_LOG_CONSOLE, "%s", slice.c_str());