diff --git a/crypto/ecdsa/ecs_lib.c b/crypto/ecdsa/ecs_lib.c
index f3007e5043350d7e132e05432b2f965c3ac1423e..4e1c63a1750a315ca23f8d9f82f93dd057cdaef6 100644
--- a/crypto/ecdsa/ecs_lib.c
+++ b/crypto/ecdsa/ecs_lib.c
@@ -247,7 +247,7 @@ void *ECDSA_get_ex_data(EC_KEY *d, int idx)
     return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
 }
 
-ECDSA_METHOD *ECDSA_METHOD_new(ECDSA_METHOD *ecdsa_meth)
+ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_meth)
 {
     ECDSA_METHOD *ret;
 
diff --git a/include/openssl/ecdsa.h b/include/openssl/ecdsa.h
index f60c229c404601412f3908c38cf3cca904963d23..4a02a01e3b33985f4871d9fdd9d44bc1afa103e3 100644
--- a/include/openssl/ecdsa.h
+++ b/include/openssl/ecdsa.h
@@ -233,7 +233,7 @@ void *ECDSA_get_ex_data(EC_KEY *d, int idx);
  *  \return pointer to a ECDSA_METHOD structure or NULL if an error occurred
  */
 
-ECDSA_METHOD *ECDSA_METHOD_new(ECDSA_METHOD *ecdsa_method);
+ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_method);
 
 /** frees a ECDSA_METHOD structure
  *  \param  ecdsa_method  pointer to the ECDSA_METHOD structure