diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46e631e2b..fe1243f03 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,7 +159,7 @@ mapnik_find_package(Boost ${BOOST_MIN_VERSION} REQUIRED COMPONENTS regex)
 if(CMAKE_CXX_STANDARD LESS 17)
    set(USE_BOOST_FILESYSTEM ON)
 endif()
-if(CMAKE_CXX_STANDARD LESS 17 OR USE_BOOST_FILESYSTEM)
+if(USE_BOOST_FILESYSTEM)
 mapnik_find_package(Boost ${BOOST_MIN_VERSION} REQUIRED COMPONENTS filesystem system)
 endif()