diff --git a/tools/cert_create/src/cert.c b/tools/cert_create/src/cert.c
index 22fe3d5..e58b10e 100644
--- a/tools/cert_create/src/cert.c
+++ b/tools/cert_create/src/cert.c
@@ -98,9 +98,10 @@
 
 int cert_new(cert_t *cert, int days, int ca, STACK_OF(X509_EXTENSION) * sk)
 {
-	EVP_PKEY *pkey = cert->key->key;
-	EVP_PKEY *ikey = cert->issuer->key->key;
-	X509 *issuer = cert->issuer->x;
+	EVP_PKEY *pkey = keys[cert->key].key;
+	cert_t *issuer_cert = &certs[cert->issuer];
+	EVP_PKEY *ikey = keys[issuer_cert->key].key;
+	X509 *issuer = issuer_cert->x;
 	X509 *x = NULL;
 	X509_EXTENSION *ex = NULL;
 	X509_NAME *name = NULL;
@@ -147,7 +148,7 @@
 	/* Issuer name */
 	name = X509_get_issuer_name(x);
 	X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC,
-			(const unsigned char *)cert->issuer->cn, -1, -1, 0);
+			(const unsigned char *)issuer_cert->cn, -1, -1, 0);
 	X509_set_issuer_name(x, name);
 
 	/* Add various extensions: standard extensions */