--- a/Src/CMakeLists.txt
+++ b/Src/CMakeLists.txt
@@ -11,6 +11,7 @@ if (NOT LIBTYPE)
     set(LIBTYPE SHARED)
 endif()
 
+include(GNUInstallDirs)
 message(STATUS "${CMAKE_BUILD_TYPE} version")
 
 include_directories(${PCRE_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
@@ -33,11 +34,11 @@ set_target_properties(ci PROPERTIES SOVERSION ${CI_API_VERSION})
 
 if(UNIX)
     if(NOT APPLE)
-        install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libda.so ${CMAKE_CURRENT_BINARY_DIR}/libda.so.${DA_API_VERSION} DESTINATION /usr/local/lib)
-        install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libci.so ${CMAKE_CURRENT_BINARY_DIR}/libci.so.${CI_API_VERSION} DESTINATION /usr/local/lib)
+        install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libda.so ${CMAKE_CURRENT_BINARY_DIR}/libda.so.${DA_API_VERSION} DESTINATION ${CMAKE_INSTALL_LIBDIR})
+        install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libci.so ${CMAKE_CURRENT_BINARY_DIR}/libci.so.${CI_API_VERSION} DESTINATION ${CMAKE_INSTALL_LIBDIR})
     else()
         install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libda.dylib ${CMAKE_CURRENT_BINARY_DIR}/libda.${DA_API_VERSION}.dylib DESTINATION /usr/local/lib)
         install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libci.dylib ${CMAKE_CURRENT_BINARY_DIR}/libci.${CI_API_VERSION}.dylib DESTINATION /usr/local/lib)
     endif()
-    install(FILES dac.h dac_json.h ci.h ci_priv.h ci_fwd.h DESTINATION /usr/local/include)
+    install(FILES dac.h dac_json.h ci.h ci_priv.h ci_fwd.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 endif()