diff --git a/crypto/ec/ec_asn1.c b/crypto/ec/ec_asn1.c
index 301a5d38c..bc4387837 100644
--- a/crypto/ec/ec_asn1.c
+++ b/crypto/ec/ec_asn1.c
@@ -1220,7 +1220,7 @@ DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
 IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
 
-void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, ECDSA_SIG *sig)
+void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const ECDSA_SIG *sig)
 {
     if (pr != NULL)
         *pr = sig->r;
diff --git a/doc/crypto/ecdsa.pod b/doc/crypto/ecdsa.pod
index dbd678f7c..67ab53679 100644
--- a/doc/crypto/ecdsa.pod
+++ b/doc/crypto/ecdsa.pod
@@ -13,7 +13,7 @@ algorithm (ECDSA) functions.
 
  ECDSA_SIG *ECDSA_SIG_new(void);
  void ECDSA_SIG_free(ECDSA_SIG *sig);
- void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, ECDSA_SIG *sig);
+ void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const ECDSA_SIG *sig);
  int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
  ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
  int ECDSA_size(const EC_KEY *eckey);
diff --git a/include/openssl/ec.h b/include/openssl/ec.h
index e67439b73..103f71820 100644
--- a/include/openssl/ec.h
+++ b/include/openssl/ec.h
@@ -1139,7 +1139,7 @@ ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
  *  \param  pr   pointer to BIGNUM pointer for r (may be NULL)
  *  \param  ps   pointer to BIGNUM pointer for s (may be NULL)
  */
-void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, ECDSA_SIG *sig);
+void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const ECDSA_SIG *sig);
 
 /** Computes the ECDSA signature of the given hash value using
  *  the supplied private key and returns the created signature.