Enable build for aarch64.
diff --git a/ref_v_binary_op.c b/ref_v_binary_op.c
index ed8f85a..908e351 100644
--- a/ref_v_binary_op.c
+++ b/ref_v_binary_op.c
@@ -25,7 +25,7 @@
 
 /* Template file for binary operator validation */
 
-#ifdef __arm__
+#if defined(__arm__) || defined(__aarch64__)
 #include <arm_neon.h>
 #else
 #include "stm-arm-neon.h"