diff --git a/src/ecdsa.c b/src/ecdsa.c
index 869c2e9..879e01b 100644
--- a/src/ecdsa.c
+++ b/src/ecdsa.c
@@ -102,7 +102,7 @@ int static secp256k1_ecdsa_sig_recompute(secp256k1_num_t *r2, const secp256k1_ec
     return ret;
 }
 
-int secp256k1_ecdsa_sig_verify(const secp256k1_ecdsa_sig_t *sig, const secp256k1_gej_t *pubkey, const secp256k1_num_t *message) {
+int static secp256k1_ecdsa_sig_verify(const secp256k1_ecdsa_sig_t *sig, const secp256k1_gej_t *pubkey, const secp256k1_num_t *message) {
     secp256k1_num_t r2;
     secp256k1_num_init(&r2);
     int ret = 0;
diff --git a/src/ecdsa.h b/src/ecdsa.h
index c4d82a4..f6f3642 100644
--- a/src/ecdsa.h
+++ b/src/ecdsa.h
@@ -13,6 +13,7 @@ void static secp256k1_ecdsa_sig_free(secp256k1_ecdsa_sig_t *r);
 int static secp256k1_ecdsa_pubkey_parse(secp256k1_gej_t *elem, const unsigned char *pub, int size);
 int static secp256k1_ecdsa_sig_parse(secp256k1_ecdsa_sig_t *r, const unsigned char *sig, int size);
 int static secp256k1_ecdsa_sig_serialize(unsigned char *sig, int *size, const secp256k1_ecdsa_sig_t *a);
+int static secp256k1_ecdsa_sig_verify(const secp256k1_ecdsa_sig_t *sig, const secp256k1_gej_t *pubkey, const secp256k1_num_t *message);
 int static secp256k1_ecdsa_sig_sign(secp256k1_ecdsa_sig_t *sig, const secp256k1_num_t *seckey, const secp256k1_num_t *message, const secp256k1_num_t *nonce);
 void static secp256k1_ecdsa_sig_set_rs(secp256k1_ecdsa_sig_t *sig, const secp256k1_num_t *r, const secp256k1_num_t *s);