diff --git a/src/sm2_lib.c b/src/sm2_lib.c
index 0cd0ee5a..27ffd46e 100644
--- a/src/sm2_lib.c
+++ b/src/sm2_lib.c
@@ -241,7 +241,6 @@ int sm2_verify(const SM2_KEY *key, const uint8_t dgst[32], const uint8_t *sig, s
 	int ret;
 	SM2_SIGNATURE signature;
 	const uint8_t *p;
-	size_t len;
 
 	if (!key
 		|| !dgst
@@ -615,7 +614,6 @@ int sm2_ciphertext_print(FILE *fp, int fmt, int ind, const char *label, const ui
 {
 	uint8_t buf[512] = {0};
 	SM2_CIPHERTEXT *c = (SM2_CIPHERTEXT *)buf;
-	int i;
 
 	if (sm2_ciphertext_from_der(c, &a, &alen) != 1
 		|| asn1_length_is_zero(alen) != 1) {
diff --git a/src/x509_crl.c b/src/x509_crl.c
index f078d465..c7c33dc7 100644
--- a/src/x509_crl.c
+++ b/src/x509_crl.c
@@ -418,8 +418,6 @@ int x509_crl_ext_id_to_der(int oid, uint8_t **out, size_t *outlen)
 int x509_crl_ext_id_from_der_ex(int *oid, uint32_t *nodes, size_t *nodes_cnt, const uint8_t **in, size_t *inlen)
 {
 	int ret;
-	const uint8_t *p;
-	size_t len;
 	const ASN1_OID_INFO *info;
 
 	*oid = 0;