diff --git a/sm4/asm_arm64.s b/sm4/asm_arm64.s
index be73422..3085f12 100644
--- a/sm4/asm_arm64.s
+++ b/sm4/asm_arm64.s
@@ -178,8 +178,8 @@ TEXT ·expandKeyAsm(SB),NOSPLIT,$0
   VEOR t1.B16, x.B16, x.B16
   VEOR t2.B16, x.B16, x.B16
   VEOR t3.B16, x.B16, x.B16
-  VAND x.B16, NIBBLE_MASK.B16, XTMP7.B16
-  VTBL XTMP7.B16, [M1L.B16], y.B16
+ // VAND x.B16, NIBBLE_MASK.B16, XTMP7.B16
+ // VTBL XTMP7.B16, [M1L.B16], y.B16
   //VSLI $-4, x.D2, x.D2
   //VAND x.B16, NIBBLE_MASK.B16, XTMP7.B16
   //VTBL XTMP7.B16, [M1H.B16], XTMP7.B16