diff --git a/Reconstruction/Jet/JetRecTools/CMakeLists.txt b/Reconstruction/Jet/JetRecTools/CMakeLists.txt
index 3e6c0310cb0b8f285007c6af9eac6ef8fea32009..da450fe57c764e3dc1b978ae0447e2f6773b27e2 100644
--- a/Reconstruction/Jet/JetRecTools/CMakeLists.txt
+++ b/Reconstruction/Jet/JetRecTools/CMakeLists.txt
@@ -6,7 +6,7 @@ atlas_subdir( JetRecTools )
 # External dependencies.
 find_package( FastJet )
 find_package( FastJetContrib COMPONENTS SoftKiller ConstituentSubtractor )
-find_package( ROOT COMPONENTS Core Math )
+find_package( ROOT COMPONENTS Core MathCore )
 
 # Component(s) in the package.
 atlas_add_library( JetRecToolsLib