diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index b275acd..308ac2f 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_library(edmCompare SHARED src/CompareEDM4hepLCIO.cc src/ObjectMapping.cc src/CompareEDM4hepEDM4hep.cc)
-target_link_libraries(edmCompare PUBLIC EDM4HEP::edm4hep LCIO::lcio)
+target_link_libraries(edmCompare PUBLIC EDM4HEP::edm4hep LCIO::lcio ROOT::MathCore)
 target_include_directories(edmCompare
   PUBLIC
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/k4EDM4hep2LcioConv/include>