diff --git a/CMakeLists.txt b/CMakeLists.txt
index de7ac9a..1d4dd48 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,7 @@
 # Copyright (C) CERN for the benefit of the SHiP Collaboration
 
 cmake_minimum_required(VERSION 3.16)
+include(GNUInstallDirs)
 
 project(
     SHiPGeometry