1 files changed, 2 insertions, 1 deletions

diff --git a/sshkey.c b/sshkey.c
index c01da6c39..377d72fa9 100644
--- a/sshkey.c
+++ b/sshkey.c
@@ -114,6 +114,7 @@ static const struct keytype keytypes[] = {
 #  endif /* OPENSSL_HAS_NISTP521 */
 # endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
+        { "null", "null", KEY_NULL, 0, 0, 0 },
         { NULL, NULL, -1, -1, 0, 0 }
 };
 
@@ -202,7 +203,7 @@ sshkey_alg_list(int certs_only, int plain_only, char sep)
         const struct keytype *kt;
 
         for (kt = keytypes; kt->type != -1; kt++) {
-                if (kt->name == NULL || kt->sigonly)
+                if (kt->name == NULL || kt->sigonly || kt->type == KEY_NULL)
                         continue;
                 if ((certs_only && !kt->cert) || (plain_only && kt->cert))
                         continue;