diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6f425fe8f..cb3818c3f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -215,6 +215,7 @@ install(FILES ${headers_necessary}
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/podio
 )
 install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/podio/utilities
+                  ${PROJECT_SOURCE_DIR}/include/podio/detail
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/podio
 )