diff --git a/cmake/DD4hepConfig.cmake.in b/cmake/DD4hepConfig.cmake.in
index c62538dc877753e34243a2a49a5b82cc0f3b72e8..7860e1793706c26d16c468f15a006a508d806117 100644
--- a/cmake/DD4hepConfig.cmake.in
+++ b/cmake/DD4hepConfig.cmake.in
@@ -52,7 +52,11 @@ else()
 endif()
 
 
-
+#---- build with Boost ?
+if(@DD4HEP_USE_BOOST@)
+  include_directories( @Boost_INCLUDE_DIR@ )
+  add_definitions(-DDD4HEP_USE_BOOST)
+endif()
 
 # ---------- final checking ---------------------------------------------------
 INCLUDE( FindPackageHandleStandardArgs )