diff --git a/kexdhc.c b/kexdhc.c
index af259f1..ad3975f 100644
--- a/kexdhc.c
+++ b/kexdhc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: kexdhc.c,v 1.18 2015/01/26 06:10:03 djm Exp $ */
+/* $OpenBSD: kexdhc.c,v 1.19 2016/05/02 10:26:04 djm Exp $ */
 /*
  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  *
@@ -63,8 +63,15 @@
 		kex->dh = dh_new_group1();
 		break;
 	case KEX_DH_GRP14_SHA1:
+	case KEX_DH_GRP14_SHA256:
 		kex->dh = dh_new_group14();
 		break;
+	case KEX_DH_GRP16_SHA512:
+		kex->dh = dh_new_group16();
+		break;
+	case KEX_DH_GRP18_SHA512:
+		kex->dh = dh_new_group18();
+		break;
 	default:
 		r = SSH_ERR_INVALID_ARGUMENT;
 		goto out;
@@ -164,6 +171,7 @@
 	/* calc and verify H */
 	hashlen = sizeof(hash);
 	if ((r = kex_dh_hash(
+	    kex->hash_alg,
 	    kex->client_version_string,
 	    kex->server_version_string,
 	    sshbuf_ptr(kex->my), sshbuf_len(kex->my),