diff --git a/usb/usb_io.cpp b/usb/usb_io.cpp
index 2319eac..f1391cb 100644
--- a/usb/usb_io.cpp
+++ b/usb/usb_io.cpp
@@ -42,15 +42,15 @@ async_usb_gadget::async_usb_gadget(std::function<FUNCTION_PROTO_COMMAND_HANDLE>
 		return;
 	}
 	
-	auto ep0 = [this](void) -> void
+	auto ep0 = [this](void*) -> void
 	{
 		thread_read_ep0();
 	};
-	auto task = [this](void) -> void
+	auto task = [this](void*) -> void
 	{
 		thread_pump_task();
 	};
-	auto bulkw = [this](void) -> void
+	auto bulkw = [this](void*) -> void
 	{
 		while(run_)
 		{
@@ -69,7 +69,7 @@ async_usb_gadget::async_usb_gadget(std::function<FUNCTION_PROTO_COMMAND_HANDLE>
 			}
 		}
 	};
-	auto bulkr = [this](void) -> void
+	auto bulkr = [this](void*) -> void
 	{
 		while(run_)
 		{
@@ -89,7 +89,7 @@ async_usb_gadget::async_usb_gadget(std::function<FUNCTION_PROTO_COMMAND_HANDLE>
 		}
 	};
 
-	auto excep = [&](const char* thread_name) -> void
+	auto excep = [&](const char* thread_name, void* param) -> void
 	{
 		threads_.stop(thread_name);
 		// threads_.start(task, "thread_pump_task");
@@ -112,10 +112,10 @@ async_usb_gadget::async_usb_gadget(std::function<FUNCTION_PROTO_COMMAND_HANDLE>
 	utils::to_log(LOG_LEVEL_DEBUG, "Prepare %u(%u * %u) for IO.\n", io_buf_.size() * unit_out_, io_buf_.size(), unit_in_);
 #endif
 
-	threads_.start(task, SIZE_MB(4), "thread_pump_task", (void*)&async_usb_gadget::thread_pump_task);
-	threads_.start(bulkw, SIZE_MB(2), "thread_write_bulk", (void*)&async_usb_gadget::thread_write_bulk);
-	threads_.start(bulkr, SIZE_MB(2), "thread_read_bulk", (void*)&async_usb_gadget::thread_read_bulk);
-	threads_.start(ep0, SIZE_MB(1), "thread_read_ep0", (void*)&async_usb_gadget::thread_read_ep0);
+	threads_.start(task, nullptr, SIZE_MB(4), "thread_pump_task", (void*)&async_usb_gadget::thread_pump_task);
+	threads_.start(bulkw, nullptr, SIZE_MB(2), "thread_write_bulk", (void*)&async_usb_gadget::thread_write_bulk);
+	threads_.start(bulkr, nullptr, SIZE_MB(2), "thread_read_bulk", (void*)&async_usb_gadget::thread_read_bulk);
+	threads_.start(ep0, nullptr, SIZE_MB(1), "thread_read_ep0", (void*)&async_usb_gadget::thread_read_ep0);
 }
 
 async_usb_gadget::~async_usb_gadget()