diff --git a/PhysicsAnalysis/AnalysisCommon/PATInterfaces/CMakeLists.txt b/PhysicsAnalysis/AnalysisCommon/PATInterfaces/CMakeLists.txt
index 2b17f8f4db4b186316027fbd5bb0ae0b08d87f51..3c0e7f91eca3c500a3b5ee3294f51b4b440039d8 100644
--- a/PhysicsAnalysis/AnalysisCommon/PATInterfaces/CMakeLists.txt
+++ b/PhysicsAnalysis/AnalysisCommon/PATInterfaces/CMakeLists.txt
@@ -45,7 +45,7 @@ endmacro( _add_test )
 atlas_add_test( gt_SystematicSet
    SOURCES test/gt_SystematicSet.cxx
    INCLUDE_DIRS ${GTEST_INCLUDE_DIRS}
-   LINK_LIBRARIES ${GTEST_LIBRARIES} PATInterfaces )
+   LINK_LIBRARIES ${GTEST_LIBRARIES} PATInterfaces RootCoreUtils )
 
 _add_test( ut_SystematicSet_unordered_map )
 _add_test( ut_SystematicVariation )