diff --git a/TestPrograms/test_arm_pmull.cxx b/TestPrograms/test_arm_pmull.cxx
index a2eee5c3..86a5a01f 100644
--- a/TestPrograms/test_arm_pmull.cxx
+++ b/TestPrograms/test_arm_pmull.cxx
@@ -11,11 +11,12 @@
 int main(int argc, char* argv[])
 {
 	poly64_t   a1={0x9090909090909090}, b1={0xb0b0b0b0b0b0b0b0};
+	poly64x2_t c1={0x9090909090909090, 0xb0b0b0b0b0b0b0b0};
 	poly8x16_t a2={0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
 	               0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0,0xa0},
 
 	poly128_t r1 = vmull_p64(a1, b1);
-	poly128_t r2 = vmull_high_p64(a1, b1);
+	poly128_t r2 = vmull_high_p64(c1, c1);
 
 	return 0;
 }