diff --git a/Serie03/Jacobi/Makefile b/Serie03/Jacobi/Makefile
index c6d5d1b..4108791 100644
--- a/Serie03/Jacobi/Makefile
+++ b/Serie03/Jacobi/Makefile
@@ -1,30 +1,30 @@
-CC=gcc
-FLAGS  = -std=gnu99 -g -O3 -march=native -lm 
+CC=icc
+FLAGS= -std=gnu99 -g -O3 -xHost
 #
-#FLAGS += -fopenmp 
+FLAGS += -fopenmp
 #FLAGS += -DPAPI -I/ssoft/papi/5.4.0/gnu/include/ /ssoft/papi/5.4.0/gnu/lib/libpapi.a
 #FLAGS +=  -I/apps/dora/iaca/iaca-lin32/include/
 #
 all: jacobi-naive jacobi-sse jacobi-avx jacobi-avx-peel jacobi-avx-block
 #
 jacobi-naive: jacobi.o jacobi-naive.o
-	gcc $(FLAGS) $^ -o $@ 
+	$(CC) $(FLAGS) $^ -o $@
 #
 jacobi-sse: jacobi.o jacobi-sse.o
-	gcc $(FLAGS) $^ -o $@ 
+	$(CC) $(FLAGS) $^ -o $@
 #
 jacobi-avx: jacobi.o jacobi-avx.o
-	gcc $(FLAGS) $^ -o $@ 
+	$(CC) $(FLAGS) $^ -o $@
 #
 jacobi-avx-peel: jacobi.o jacobi-avx-peel.o
-	gcc $(FLAGS) $^ -o $@ 
+	$(CC) $(FLAGS) $^ -o $@
 #
 jacobi-avx-block: jacobi.o jacobi-avx-block.o
-	gcc $(FLAGS) $^ -o $@ 
+	$(CC) $(FLAGS) $^ -o $@
 #
 %.o: %.c
 	$(CC) -c $(FLAGS) $<
 	$(CC) -S $(FLAGS) $< -o $@.s 
 #
 clean:
 	rm -f *.s *.lst *.o jacobi-avx jacobi-avx-peel jacobi-avx-block jacobi-sse jacobi-naive