diff --git a/CMakeLists.txt b/CMakeLists.txt
index 093e7e7..11675aa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -238,6 +238,7 @@ if ( E57_BUILD_TEST )
 endif()
 
 # CMake package files
+include( GNUInstallDirs )
 set( E57_INSTALL_CMAKEDIR
     "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
      CACHE STRING