--- src/p11_cert.c
+++ src/p11_cert.c
@@ -173,7 +173,7 @@
 		cert->x509 = d2i_X509(NULL, &p, size);
 	}
 	cert->id_len = sizeof(id);
-	if (!pkcs11_getattr_var(token, obj, CKA_ID, id, (size_t *) & cert->id_len)) {
+	if (!pkcs11_getattr_var(token, obj, CKA_ID, id, &cert->id_len)) {
 		cert->id = (unsigned char *) malloc(cert->id_len);
 		memcpy(cert->id, id, cert->id_len);
 	}
--- src/p11_key.c
+++ src/p11_key.c
@@ -282,7 +282,7 @@
 	if (!pkcs11_getattr_s(token, obj, CKA_LABEL, label, sizeof(label)))
 		key->label = BUF_strdup(label);
 	key->id_len = sizeof(id);
-	if (!pkcs11_getattr_var(token, obj, CKA_ID, id, (size_t *) & key->id_len)) {
+	if (!pkcs11_getattr_var(token, obj, CKA_ID, id, &key->id_len)) {
 		key->id = (unsigned char *) malloc(key->id_len);
 		memcpy(key->id, id, key->id_len);
 	}