1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index c944309..72994be 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ SRC_DIR  = ./src
 
 CPP = g++
 
-CPPFLAGS = -O3 -std=gnu++11 -I$(EIGEN_INCLUDE_PATH)
+CPPFLAGS = -O3 -std=gnu++11 -isystem$(EIGEN_INCLUDE_PATH)
 
 ifdef SHOW_COMPILER_WARNINGS
   CPPFLAGS += -Wall