diff --git a/aes-intrinsic/Makefile b/aes-intrinsic/Makefile
index f88ecef..22551bf 100644
--- a/aes-intrinsic/Makefile
+++ b/aes-intrinsic/Makefile
@@ -1,4 +1,4 @@
-CPPFLAGS = -Ofast
+CPPFLAGS = -maes -Ofast
 
 BUILD_DIR = bin