diff --git a/cmake/DD4hepConfig.cmake.in b/cmake/DD4hepConfig.cmake.in
index 6150d6cd38bcee9dcb8627ccb6314432f7807615..1922bb1a59463c3a5bba58aa1a29cd59987ebac7 100644
--- a/cmake/DD4hepConfig.cmake.in
+++ b/cmake/DD4hepConfig.cmake.in
@@ -14,6 +14,7 @@
 ##############################################################################
 
 SET( DD4hep_DIR "@CMAKE_INSTALL_PREFIX@" )
+SET( DD4hep_ROOT "@CMAKE_INSTALL_PREFIX@" )
 SET( DD4hep_VERSION "@DD4hep_VERSION@" )
 
 INCLUDE( ${DD4hep_DIR}/cmake/DD4hep.cmake )