diff --git a/sm4/asm_ppc64x.s b/sm4/asm_ppc64x.s
index 187f348..8273615 100644
--- a/sm4/asm_ppc64x.s
+++ b/sm4/asm_ppc64x.s
@@ -127,8 +127,7 @@ GLOBL ·rcon(SB), RODATA, $192
 	;                                       \ //####################  4 parallel L2 linear transforms ##################//
 	VSPLTISW $13, z;                        \
 	VRLW	x, z, y;                        \ // y = x <<< 13
-	VXOR x, y, y;                           \ 
-	VRLW x, z, x;                           \ // x = x <<< 13
+	VXOR x, y, y;                           \
 	VSPLTISW $10, z;                        \
 	VRLW x, z, x;                           \ // x = x <<< 10
 	VXOR x, y, x