diff --git a/CMakeLists.txt b/CMakeLists.txt
index 07c06cc..a3d78ea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,7 @@ target_include_directories(${PROJECT_NAME} INTERFACE include)
 
 # install header files
 install(FILES include/clipboardxx.hpp DESTINATION include)
+install(DIRECTORY include/detail DESTINATION include)
 
 # dependencies
 if(UNIX AND NOT APPLE)