diff --git a/sm4/aesni_macros_ppc64x.s b/sm4/aesni_macros_ppc64x.s
index f162c6d..f6f76fd 100644
--- a/sm4/aesni_macros_ppc64x.s
+++ b/sm4/aesni_macros_ppc64x.s
@@ -84,7 +84,7 @@
 // -  y: 128 bits temp register
 // -  z: 128 bits temp register
 #define AFFINE_TRANSFORM(L, H, V_FOUR, x, y, z)  \
-	VPERMXOR L, H, x, x
+	VPERMXOR H, L, x, x
 
 // Affine Transform
 // parameters: