Added ndmalloc directory to the include path

diff --git a/Makefile b/Makefile
index 705bdfa..d6098e1 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 CC=gcc
 #CFLAGS=-std=gnu99 -Wall -g -ipo -xHost -Ofast
 #LDFLAGS=-g -O3 -DNDEBUG -xHost -Ofast -ipo
-CFLAGS=-std=gnu99 -g -flto -march=native -O3 -ffast-math
+CFLAGS=-std=gnu99 -g -flto -march=native -O3 -ffast-math -I./ndmalloc
 LDFLAGS=-g -O3 -DNDEBUG -flto -march=native -ffast-math
 LDLIBS=-lm