diff --git a/lib/vtls/bearssl.c b/lib/vtls/bearssl.c
index 40a5e7879..397698da4 100644
--- a/lib/vtls/bearssl.c
+++ b/lib/vtls/bearssl.c
@@ -840,30 +840,32 @@ static CURLcode bearssl_sha256sum(const unsigned char *input,
 }
 
 const struct Curl_ssl Curl_ssl_bearssl = {
-  { CURLSSLBACKEND_BEARSSL, "bearssl" },
+  { CURLSSLBACKEND_BEARSSL, "bearssl" }, /* info */
   0,
   sizeof(struct ssl_backend_data),
 
-  Curl_none_init,
-  Curl_none_cleanup,
-  bearssl_version,
-  Curl_none_check_cxn,
-  Curl_none_shutdown,
-  bearssl_data_pending,
-  bearssl_random,
-  Curl_none_cert_status_request,
-  bearssl_connect,
-  bearssl_connect_nonblocking,
-  Curl_ssl_getsock,
-  bearssl_get_internals,
-  bearssl_close,
-  Curl_none_close_all,
-  bearssl_session_free,
-  Curl_none_set_engine,
-  Curl_none_set_engine_default,
-  Curl_none_engines_list,
-  Curl_none_false_start,
-  bearssl_sha256sum
+  Curl_none_init,                  /* init */
+  Curl_none_cleanup,               /* cleanup */
+  bearssl_version,                 /* version */
+  Curl_none_check_cxn,             /* check_cxn */
+  Curl_none_shutdown,              /* shutdown */
+  bearssl_data_pending,            /* data_pending */
+  bearssl_random,                  /* random */
+  Curl_none_cert_status_request,   /* cert_status_request */
+  bearssl_connect,                 /* connect */
+  bearssl_connect_nonblocking,     /* connect_nonblocking */
+  Curl_ssl_getsock,                /* getsock */
+  bearssl_get_internals,           /* get_internals */
+  bearssl_close,                   /* close_one */
+  Curl_none_close_all,             /* close_all */
+  bearssl_session_free,            /* session_free */
+  Curl_none_set_engine,            /* set_engine */
+  Curl_none_set_engine_default,    /* set_engine_default */
+  Curl_none_engines_list,          /* engines_list */
+  Curl_none_false_start,           /* false_start */
+  bearssl_sha256sum,               /* sha256sum */
+  NULL,                            /* associate_connection */
+  NULL                             /* disassociate_connection */
 };
 
 #endif /* USE_BEARSSL */