diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2a02433..9b5b1cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -122,7 +122,13 @@ elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.3.0)
     message(FATAL_ERROR "llvm/clang 3.3 or higher required!")
   endif()
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
+  if("${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "MSVC")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+    add_definitions(-DUNICODE -DNOMINMAX)
+    set(CMAKE_DEBUG_POSTFIX _d)
+  else()
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
+  endif()
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
   if(MSVC_VERSION LESS 1900)
     message(FATAL_ERROR "msvc 2015 or higher required!")