diff --git a/CMakeLists.txt b/CMakeLists.txt
index d6c3900..f870eeb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,9 @@ project(${SKBUILD_PROJECT_NAME})
 
 # required for linking fmt library during cibuildwheels build on manylinux_2_28
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
+if(UNIX)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
+endif()
 
 include(FetchContent)
 FetchContent_Declare(