diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2a2a9b073..99368e570 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -105,7 +105,7 @@ install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE
               DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
 
-install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/edm4hep/
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/edm4hep
         FILES_MATCHING PATTERN "*.h")
 
diff --git a/include/Constants.h b/include/edm4hep/Constants.h
similarity index 100%
rename from include/Constants.h
rename to include/edm4hep/Constants.h