diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0c1bfef94..3c879b8958 100644
--- a/CMakeLists.txt	
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ target_link_libraries(boost_process
     Boost::asio
     Boost::config
     Boost::core
-    Boost::filesystem
+    $<TARGET_NAME_IF_EXISTS:Boost::filesystem>
     Boost::fusion
     Boost::iterator
     Boost::move
@@ -28,6 +28,10 @@ target_link_libraries(boost_process
     Boost::winapi
 )
 
+if(NOT TARGET Boost::filesystem)
+  target_compile_definitions(boost_process INTERFACE $<$<NOT:$<TARGET_EXISTS:Boost::filesystem>>:BOOST_PROCESS_USE_STD_FS>)
+endif()
+
 if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")
 
   add_subdirectory(test)