diff --git a/include/types/ssl_sock.h b/include/types/ssl_sock.h
index a384f05..e3a85ca 100644
--- a/include/types/ssl_sock.h
+++ b/include/types/ssl_sock.h
@@ -29,7 +29,8 @@
 struct sni_ctx {
 	SSL_CTX *ctx;             /* context associated to the certificate */
 	int order;                /* load order for the certificate */
-	int neg;                  /* reject if match */
+	uint8_t neg;              /* reject if match */
+	uint8_t key_sig;          /* TLSEXT_signature_[rsa,ecdsa,...] */
 	struct ssl_bind_conf *conf; /* ssl "bind" conf for the certificate */
 	struct ebmb_node name;    /* node holding the servername value */
 };