diff --git a/src/connection.c b/src/connection.c
index 3656b36..6126dd1 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -1423,6 +1423,12 @@
 
 	conn_hash_update(buf, &idx, &params->srv, sizeof(params->srv), &hash_flags, 0);
 
+	if (params->sni_prehash) {
+		conn_hash_update(buf, &idx,
+		                 params->sni_prehash, sizeof(*params->sni_prehash),
+		                 &hash_flags, CONN_HASH_PARAMS_TYPE_SNI);
+	}
+
 	hash = conn_hash_digest(buf, idx, hash_flags);
 	return hash;
 }