diff --git a/external/InstallAnalysisTree.cmake b/external/InstallAnalysisTree.cmake
index 663474ba8934bba39f08b91444cc3f8a89f0453a..a5140c5d47d6cd2fe818b3229f643cc7d8f37964 100644
--- a/external/InstallAnalysisTree.cmake
+++ b/external/InstallAnalysisTree.cmake
@@ -65,6 +65,6 @@ endforeach(LIB_NAME)
 #        ${CMAKE_BINARY_DIR}/lib/${CMAKE_SHARED_LIBRARY_PREFIX}AnalysisTree_rdict.pcm
 #        DESTINATION lib
 #        )
-Install(FILES ${CMAKE_BINARY_DIR}/include/AnalysisTree
+Install(DIRECTORY  ${CMAKE_BINARY_DIR}/include/AnalysisTree
         DESTINATION include
        )
\ No newline at end of file