diff --git a/tools/cert_create/src/key.c b/tools/cert_create/src/key.c
index c1bde5dea..e8257e94c 100644
--- a/tools/cert_create/src/key.c
+++ b/tools/cert_create/src/key.c
@@ -91,9 +91,10 @@ err:
 
 typedef int (*key_create_fn_t)(key_t *key);
 static const key_create_fn_t key_create_fn[KEY_ALG_MAX_NUM] = {
-	key_create_rsa,
+	key_create_rsa, 	/* KEY_ALG_RSA */
+	key_create_rsa, 	/* KEY_ALG_RSA_1_5 */
 #ifndef OPENSSL_NO_EC
-	key_create_ecdsa,
+	key_create_ecdsa, 	/* KEY_ALG_ECDSA */
 #endif /* OPENSSL_NO_EC */
 };