diff --git a/sm3/sm3blocks_s390x.s b/sm3/sm3blocks_s390x.s
index 8eeb1a7..cd1a930 100644
--- a/sm3/sm3blocks_s390x.s
+++ b/sm3/sm3blocks_s390x.s
@@ -47,7 +47,7 @@ GLOBL mask<>(SB), RODATA, $64
 	VPERM T2, T3, M0, TMP1; \
 	VPERM T0, T1, M1, TMP2; \
 	VPERM T2, T3, M1, TMP3; \
-	VPERM TMP0, TMP1, M2, T0; \
+	VPDI $0x2, TMP0, TMP1, T0; \
 	VPERM TMP0, TMP1, M3, T1; \
 	VPERM TMP2, TMP3, M2, T2; \
 	VPERM TMP2, TMP3, M3, T3