diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad45b67..9f0208b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,7 +30,7 @@ ADD_DEFINITIONS( ${Marlin_DEFINITIONS} )
 
 
 FIND_PACKAGE( ROOT REQUIRED ) 
-INCLUDE_DIRECTORIES( ${ROOT_INCLUDE_DIRS} )
+INCLUDE_DIRECTORIES( SYSTEM ${ROOT_INCLUDE_DIRS} )
 LINK_LIBRARIES( ${ROOT_LIBRARIES} )
 ADD_DEFINITIONS( ${ROOT_DEFINITIONS} )