1 files changed, 2 insertions, 1 deletions

diff --git a/sshkey.c b/sshkey.c
index 6555c5ef8..a85c185fc 100644
--- a/sshkey.c
+++ b/sshkey.c
@@ -135,6 +135,7 @@ static const struct keytype keytypes[] = {
 #  endif /* OPENSSL_HAS_NISTP521 */
 # endif /* OPENSSL_HAS_ECC */
 #endif /* WITH_OPENSSL */
+        { "null", "null", NULL, KEY_NULL, 0, 0, 0 },
         { NULL, NULL, NULL, -1, -1, 0, 0 }
 };
 
@@ -223,7 +224,7 @@ sshkey_alg_list(int certs_only, int plain_only, int include_sigonly, char sep)
         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 (!include_sigonly && kt->sigonly)
                         continue;