diff --git a/build/cmake/select_filesystem.cmake b/build/cmake/select_filesystem.cmake
index 8b2acf1d..abd82cb4 100644
--- a/build/cmake/select_filesystem.cmake
+++ b/build/cmake/select_filesystem.cmake
@@ -161,6 +161,7 @@ else()
                               Set NANA_CMAKE_NANA_FILESYSTEM_FORCE to ON to avoid this warning.")
             target_compile_definitions(nana PUBLIC STD_FILESYSTEM_NOT_SUPPORTED)
             set (CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES_ORIGINAL})
+            set (CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_ORIGINAL}")
         endif ()
         endif ()
         endif ()