diff --git a/include/gmssl/sm2_z256.h b/include/gmssl/sm2_z256.h
index 4fc27d50..f69eab6a 100644
--- a/include/gmssl/sm2_z256.h
+++ b/include/gmssl/sm2_z256.h
@@ -102,12 +102,12 @@ int sm2_z256_point_print(FILE *fp, int fmt, int ind, const char *label, const SM
 typedef struct {
 	uint64_t x[4];
 	uint64_t y[4];
-} SM2_Z256_POINT_AFFINE;
+} SM2_Z256_AFFINE_POINT;
 
-void sm2_z256_point_copy_affine(SM2_Z256_POINT *R, const SM2_Z256_POINT_AFFINE *P);
-void sm2_z256_point_add_affine(SM2_Z256_POINT *r, const SM2_Z256_POINT *a, const SM2_Z256_POINT_AFFINE *b);
-void sm2_z256_point_sub_affine(SM2_Z256_POINT *R, const SM2_Z256_POINT *A, const SM2_Z256_POINT_AFFINE *B);
-int sm2_z256_point_affine_print(FILE *fp, int fmt, int ind, const char *label, const SM2_Z256_POINT_AFFINE *P);
+void sm2_z256_point_copy_affine(SM2_Z256_POINT *R, const SM2_Z256_AFFINE_POINT *P);
+void sm2_z256_point_add_affine(SM2_Z256_POINT *r, const SM2_Z256_POINT *a, const SM2_Z256_AFFINE_POINT *b);
+void sm2_z256_point_sub_affine(SM2_Z256_POINT *R, const SM2_Z256_POINT *A, const SM2_Z256_AFFINE_POINT *B);
+int sm2_z256_point_affine_print(FILE *fp, int fmt, int ind, const char *label, const SM2_Z256_AFFINE_POINT *P);
 
 void sm2_z256_point_mul_generator(SM2_Z256_POINT *R, const uint64_t k[4]);
 void sm2_z256_point_mul(SM2_Z256_POINT *R, const uint64_t k[4], const SM2_Z256_POINT *P);
diff --git a/include/gmssl/sm9.h b/include/gmssl/sm9.h
index dcbcb6cf..7fa9cb75 100644
--- a/include/gmssl/sm9.h
+++ b/include/gmssl/sm9.h
@@ -186,6 +186,16 @@ int  sm9_z256_point_to_uncompressed_octets(const SM9_Z256_POINT *P, uint8_t octe
 int  sm9_z256_point_from_uncompressed_octets(SM9_Z256_POINT *P, const uint8_t octets[65]);
 
 
+typedef struct {
+	uint64_t X[4];
+	uint64_t Y[4];
+} SM9_Z256_AFFINE_POINT;
+
+void sm9_z256_point_copy_affine(SM9_Z256_POINT *R, const SM9_Z256_AFFINE_POINT *P);
+void sm9_z256_point_add_affine(SM9_Z256_POINT *R, const SM9_Z256_POINT *P, const SM9_Z256_AFFINE_POINT *Q);
+void sm9_z256_point_sub_affine(SM9_Z256_POINT *R, const SM9_Z256_POINT *P, const SM9_Z256_AFFINE_POINT *Q);
+
+
 typedef struct {
 	sm9_z256_fp2_t X;
 	sm9_z256_fp2_t Y;
diff --git a/src/sm2_z256.c b/src/sm2_z256.c
index 90f2cd71..074adb2d 100644
--- a/src/sm2_z256.c
+++ b/src/sm2_z256.c
@@ -1394,16 +1394,16 @@ int sm2_z256_point_print(FILE *fp, int fmt, int ind, const char *label, const SM
 }
 
 
-void sm2_z256_point_copy_affine(SM2_Z256_POINT *R, const SM2_Z256_POINT_AFFINE *P)
+void sm2_z256_point_copy_affine(SM2_Z256_POINT *R, const SM2_Z256_AFFINE_POINT *P)
 {
-	memcpy(R, P, sizeof(SM2_Z256_POINT_AFFINE));
+	memcpy(R, P, sizeof(SM2_Z256_AFFINE_POINT));
 	sm2_z256_copy(R->Z, SM2_Z256_MODP_MONT_ONE);
 }
 
 // 这是一个比较容易并行的算法
 // r, a, b 都转换为实际输入的值
 #ifndef ENABLE_SM2_Z256_ARMV8
-void sm2_z256_point_add_affine(SM2_Z256_POINT *r, const SM2_Z256_POINT *a, const SM2_Z256_POINT_AFFINE *b)
+void sm2_z256_point_add_affine(SM2_Z256_POINT *r, const SM2_Z256_POINT *a, const SM2_Z256_AFFINE_POINT *b)
 {
 	uint64_t U2[4], S2[4];
 	uint64_t Z1sqr[4];
@@ -1486,9 +1486,9 @@ void sm2_z256_point_add_affine(SM2_Z256_POINT *r, const SM2_Z256_POINT *a, const
 #endif
 
 void sm2_z256_point_sub_affine(SM2_Z256_POINT *R,
-	const SM2_Z256_POINT *A, const SM2_Z256_POINT_AFFINE *B)
+	const SM2_Z256_POINT *A, const SM2_Z256_AFFINE_POINT *B)
 {
-	SM2_Z256_POINT_AFFINE neg_B;
+	SM2_Z256_AFFINE_POINT neg_B;
 
 	sm2_z256_copy(neg_B.x, B->x);
 	sm2_z256_modp_neg(neg_B.y, B->y);
@@ -1496,7 +1496,7 @@ void sm2_z256_point_sub_affine(SM2_Z256_POINT *R,
 	sm2_z256_point_add_affine(R, A, &neg_B);
 }
 
-int sm2_z256_point_affine_print(FILE *fp, int fmt, int ind, const char *label, const SM2_Z256_POINT_AFFINE *P)
+int sm2_z256_point_affine_print(FILE *fp, int fmt, int ind, const char *label, const SM2_Z256_AFFINE_POINT *P)
 {
 	uint8_t affine[64];
 	uint64_t a[4];
@@ -1512,7 +1512,7 @@ int sm2_z256_point_affine_print(FILE *fp, int fmt, int ind, const char *label, c
 }
 
 extern const uint64_t sm2_z256_pre_comp[37][64 * 4 * 2];
-static SM2_Z256_POINT_AFFINE (*g_pre_comp)[64] = (SM2_Z256_POINT_AFFINE (*)[64])sm2_z256_pre_comp;
+static SM2_Z256_AFFINE_POINT (*g_pre_comp)[64] = (SM2_Z256_AFFINE_POINT (*)[64])sm2_z256_pre_comp;
 
 
 /*