diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,7 @@
 find_package(Eigen3) # find and setup Eigen3 if available
 set(HAVE_EIGEN3 ${EIGEN3_FOUND})
 if(EIGEN3_FOUND)
-    include_directories(${EIGEN3_INCLUDE_DIR})
+    include_directories(SYSTEM ${EIGEN3_INCLUDE_DIR})
 endif()
 
 include_directories(${CMAKE_SOURCE_DIR} ${CMAKE_BINARY_DIR})