diff --git a/CMakeLists.txt b/CMakeLists.txt
index 440490b..2faafba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,8 +70,9 @@ target_include_directories(cxxopts INTERFACE
     $<INSTALL_INTERFACE:include>
     )
 
+include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
-set(CXXOPTS_CMAKE_DIR "lib/cmake/cxxopts" CACHE STRING
+set(CXXOPTS_CMAKE_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/cxxopts" CACHE STRING
   "Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
 set(version_config "${PROJECT_BINARY_DIR}/cxxopts-config-version.cmake")
 set(project_config "${PROJECT_BINARY_DIR}/cxxopts-config.cmake")
@@ -97,8 +98,8 @@ install(EXPORT ${targets_export_name} DESTINATION ${CXXOPTS_CMAKE_DIR}
     NAMESPACE cxxopts::)
 
 # Install the header file and export the target
-install(TARGETS cxxopts EXPORT ${targets_export_name} DESTINATION lib)
-install(FILES ${PROJECT_SOURCE_DIR}/include/cxxopts.hpp DESTINATION include)
+install(TARGETS cxxopts EXPORT ${targets_export_name} DESTINATION ${CMAKE_INSTALL_LIBDIR})
+install(FILES ${PROJECT_SOURCE_DIR}/include/cxxopts.hpp DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
 add_subdirectory(src)
 add_subdirectory(test)