diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48a38d9..64f7e74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,15 +20,18 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 set(CMAKE_CXX_FLAGS "-Wall")
 
-if (NOT MSVC)
-    if (CMAKE_POSITION_INDEPENDENT_CODE)
-        include(CheckPIESupported)
+if (CMAKE_POSITION_INDEPENDENT_CODE)
+    include(CheckPIESupported)
+    if (NOT MSVC)
         add_link_options("-pie")
-        check_pie_supported()
-    endif()
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
+    endif ()
+    check_pie_supported()
+endif()
+
+if (NOT MSVC)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
+    set(CMAKE_CXX_FLAGS_RELEASE "-Os")
 endif()
-set(CMAKE_CXX_FLAGS_RELEASE "-Os")
 
 if ((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang))
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 11.0)