diff --git a/example/Vulkan/VKInstance.cpp b/example/Vulkan/VKInstance.cpp
index cf5ff14f..918c38b7 100644
--- a/example/Vulkan/VKInstance.cpp
+++ b/example/Vulkan/VKInstance.cpp
@@ -125,17 +125,17 @@ Instance *CreateInstance(const UTF8String &app_name)
     const char *validation_layers[]=
     {
 //        "VK_LAYER_LUNARG_api_dump",
-        "VK_LAYER_LUNARG_assistant_layer",
+//        "VK_LAYER_LUNARG_assistant_layer",
         "VK_LAYER_LUNARG_core_validation",
 //        "VK_LAYER_LUNARG_device_simulation",
-        "VK_LAYER_LUNARG_monitor",
+//        "VK_LAYER_LUNARG_monitor",
         "VK_LAYER_LUNARG_object_tracker",
         "VK_LAYER_LUNARG_standard_validation",
         "VK_LAYER_LUNARG_parameter_validation",
 //        "VK_LAYER_LUNARG_vktrace",
 //        "VK_LAYER_RENDERDOC_Capture",
 
-        "VK_LAYER_KHRONOS_validation",
+//        "VK_LAYER_KHRONOS_validation",
 
 //        "VK_LAYER_NV_nsight-sys",
 
diff --git a/example/Vulkan/main.cpp b/example/Vulkan/main.cpp
index ca3b18d2..2435217f 100644
--- a/example/Vulkan/main.cpp
+++ b/example/Vulkan/main.cpp
@@ -16,6 +16,10 @@
 #include"VKFramebuffer.h"
 
 #include<fstream>
+#ifdef WIN32
+#else
+#include<unistd.h>
+#endif//
 
 using namespace hgl;
 using namespace hgl::graph;
@@ -170,7 +174,7 @@ int main(int,char **)
         return -3;
 
     vulkan::Semaphore *sem=device->CreateSem();
-    
+
     vulkan::VertexInput *vi=CreateVertexBuffer(device);
 
     vulkan::PipelineCreater pc(device);