diff --git a/sm4/asm_arm64.s b/sm4/asm_arm64.s
index bb71c9f..c362d93 100644
--- a/sm4/asm_arm64.s
+++ b/sm4/asm_arm64.s
@@ -186,7 +186,7 @@ TEXT ·expandKeyAsm(SB),NOSPLIT,$0
   VEOR y.B16, XTMP7.B16, x.B16
   //VTBL INVERSE_SHIFT_ROWS.B16, [x.B16], x.B16
   
-  VEOR x.B16, t0.B16, t0.B16
+  VEOR XTMP7.B16, t0.B16, t0.B16
   
   VMOV t0.S[0], R2
   MOVW.P R2, 4(R10)