1 files changed, 2 insertions, 1 deletions

diff --git a/key.c b/key.c
index 914233808..7ac844c66 100644
--- a/key.c
+++ b/key.c
@@ -985,6 +985,7 @@ static const struct keytype keytypes[] = {
             KEY_DSA_CERT_V00, 0, 1 },
         { "ssh-ed25519-cert-v01@openssh.com", "ED25519-CERT",
             KEY_ED25519_CERT, 0, 1 },
+        { "null", "null", KEY_NULL, 0, 0 },
         { NULL, NULL, -1, -1, 0 }
 };
 
@@ -1063,7 +1064,7 @@ key_alg_list(int certs_only, int plain_only)
         const struct keytype *kt;
 
         for (kt = keytypes; kt->type != -1; kt++) {
-                if (kt->name == NULL)
+                if (kt->name == NULL || kt->type == KEY_NULL)
                         continue;
                 if ((certs_only && !kt->cert) || (plain_only && kt->cert))
                         continue;