diff --git a/include/proto/ssl_sock.h b/include/proto/ssl_sock.h
index 0902fde..3e111cd 100644
--- a/include/proto/ssl_sock.h
+++ b/include/proto/ssl_sock.h
@@ -52,7 +52,7 @@
 const char *ssl_sock_get_proto_version(struct connection *conn);
 char *ssl_sock_get_version(struct connection *conn);
 int ssl_sock_get_cert_used(struct connection *conn);
-char *ssl_sock_get_common_name(struct connection *conn);
+int ssl_sock_get_remote_common_name(struct connection *conn, struct chunk *out);
 unsigned int ssl_sock_get_verify_result(struct connection *conn);
 #ifdef SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB
 int ssl_sock_update_ocsp_response(struct chunk *ocsp_response, char **err);