diff --git a/regress/unittests/kex/test_kex.c b/regress/unittests/kex/test_kex.c
index 06bd001ae..3bd71a9f4 100644
--- a/regress/unittests/kex/test_kex.c
+++ b/regress/unittests/kex/test_kex.c
@@ -202,6 +202,8 @@ kex_tests(void)
 	do_kex("diffie-hellman-group-exchange-sha1");
 	do_kex("diffie-hellman-group14-sha1");
 	do_kex("diffie-hellman-group1-sha1");
+# ifdef USE_SNTRUP761X25519
 	do_kex("sntrup761x25519-sha512@openssh.com");
+# endif /* USE_SNTRUP761X25519 */
 #endif /* WITH_OPENSSL */
 }