diff --git a/include/crypto/secret.h b/include/crypto/secret.h
index 5d20ae6d2f..4eb4e5ffef 100644
--- a/include/crypto/secret.h
+++ b/include/crypto/secret.h
@@ -26,11 +26,9 @@
 #include "crypto/secret_common.h"
 
 #define TYPE_QCRYPTO_SECRET "secret"
-typedef struct QCryptoSecret QCryptoSecret;
-DECLARE_INSTANCE_CHECKER(QCryptoSecret, QCRYPTO_SECRET,
-                         TYPE_QCRYPTO_SECRET)
 
-typedef struct QCryptoSecretClass QCryptoSecretClass;
+OBJECT_DECLARE_SIMPLE_TYPE(QCryptoSecret, qcrypto_secret,
+                           QCRYPTO_SECRET, QCryptoSecretCommon)
 
 /**
  * QCryptoSecret:
@@ -125,9 +123,4 @@ struct QCryptoSecret {
     char *file;
 };
 
-
-struct QCryptoSecretClass {
-    QCryptoSecretCommonClass parent_class;
-};
-
 #endif /* QCRYPTO_SECRET_H */
diff --git a/crypto/secret.c b/crypto/secret.c
index c07011d388..55b406f79e 100644
--- a/crypto/secret.c
+++ b/crypto/secret.c
@@ -25,6 +25,9 @@
 #include "qemu/module.h"
 #include "trace.h"
 
+OBJECT_DEFINE_TYPE_WITH_INTERFACES(QCryptoSecret, qcrypto_secret,
+                                   QCRYPTO_SECRET, QCRYPTO_SECRET_COMMON,
+                                   { TYPE_USER_CREATABLE }, { NULL })
 
 static void
 qcrypto_secret_load_data(QCryptoSecretCommon *sec_common,
@@ -140,21 +143,7 @@ qcrypto_secret_class_init(ObjectClass *oc, void *data)
                                   qcrypto_secret_prop_set_file);
 }
 
-
-static const TypeInfo qcrypto_secret_info = {
-    .parent = TYPE_QCRYPTO_SECRET_COMMON,
-    .name = TYPE_QCRYPTO_SECRET,
-    .instance_size = sizeof(QCryptoSecret),
-    .instance_finalize = qcrypto_secret_finalize,
-    .class_size = sizeof(QCryptoSecretClass),
-    .class_init = qcrypto_secret_class_init,
-    .interfaces = (InterfaceInfo[]) {
-        { TYPE_USER_CREATABLE },
-        { }
-    }
-};
-TYPE_INFO(qcrypto_secret_info)
-
-
-
-
+static void
+qcrypto_secret_init(Object *obj)
+{
+}
diff --git a/crypto/secret_common.c b/crypto/secret_common.c
index 80d7d75b4d..9a054b90b5 100644
--- a/crypto/secret_common.c
+++ b/crypto/secret_common.c
@@ -28,6 +28,9 @@
 #include "trace.h"
 
 
+OBJECT_DEFINE_ABSTRACT_TYPE(QCryptoSecretCommon, qcrypto_secret_common,
+                            QCRYPTO_SECRET_COMMON, OBJECT)
+
 static void qcrypto_secret_decrypt(QCryptoSecretCommon *secret,
                                    const uint8_t *input,
                                    size_t inputlen,
@@ -269,7 +272,7 @@ qcrypto_secret_prop_get_keyid(Object *obj,
 
 
 static void
-qcrypto_secret_finalize(Object *obj)
+qcrypto_secret_common_finalize(Object *obj)
 {
     QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj);
 
@@ -279,7 +282,7 @@ qcrypto_secret_finalize(Object *obj)
 }
 
 static void
-qcrypto_secret_class_init(ObjectClass *oc, void *data)
+qcrypto_secret_common_class_init(ObjectClass *oc, void *data)
 {
     object_class_property_add_bool(oc, "loaded",
                                    qcrypto_secret_prop_get_loaded,
@@ -297,6 +300,10 @@ qcrypto_secret_class_init(ObjectClass *oc, void *data)
                                   qcrypto_secret_prop_set_iv);
 }
 
+static void
+qcrypto_secret_common_init(Object *obj)
+{
+}
 
 int qcrypto_secret_lookup(const char *secretid,
                           uint8_t **data,
@@ -380,19 +387,3 @@ char *qcrypto_secret_lookup_as_base64(const char *secretid,
     g_free(data);
     return ret;
 }
-
-
-static const TypeInfo qcrypto_secret_info = {
-    .parent = TYPE_OBJECT,
-    .name = TYPE_QCRYPTO_SECRET_COMMON,
-    .instance_size = sizeof(QCryptoSecretCommon),
-    .instance_finalize = qcrypto_secret_finalize,
-    .class_size = sizeof(QCryptoSecretCommonClass),
-    .class_init = qcrypto_secret_class_init,
-    .abstract = true,
-};
-TYPE_INFO(qcrypto_secret_info)
-
-
-
-
diff --git a/crypto/secret_keyring.c b/crypto/secret_keyring.c
index 821d2e421b..463aefe5dc 100644
--- a/crypto/secret_keyring.c
+++ b/crypto/secret_keyring.c
@@ -26,6 +26,9 @@
 #include "trace.h"
 #include "crypto/secret_keyring.h"
 
+OBJECT_DEFINE_TYPE_WITH_INTERFACES(QCryptoSecretKeyring, qcrypto_secret_keyring,
+                                   QCRYPTO_SECRET_KEYRING, QCRYPTO_SECRET_COMMON,
+                                   { TYPE_USER_CREATABLE }, { NULL })
 
 static inline
 long keyctl_read(int32_t key, uint8_t *buffer, size_t buflen)
@@ -109,6 +112,11 @@ qcrypto_secret_keyring_complete(UserCreatable *uc, Error **errp)
 }
 
 
+static void
+qcrypto_secret_keyring_finalize(Object *obj)
+{
+}
+
 static void
 qcrypto_secret_keyring_class_init(ObjectClass *oc, void *data)
 {
@@ -124,20 +132,7 @@ qcrypto_secret_keyring_class_init(ObjectClass *oc, void *data)
                                   NULL, NULL);
 }
 
-
-static const TypeInfo qcrypto_secret_info = {
-    .parent = TYPE_QCRYPTO_SECRET_COMMON,
-    .name = TYPE_QCRYPTO_SECRET_KEYRING,
-    .instance_size = sizeof(QCryptoSecretKeyring),
-    .class_size = sizeof(QCryptoSecretKeyringClass),
-    .class_init = qcrypto_secret_keyring_class_init,
-    .interfaces = (InterfaceInfo[]) {
-        { TYPE_USER_CREATABLE },
-        { }
-    }
-};
-TYPE_INFO(qcrypto_secret_info)
-
-
-
-
+static void
+qcrypto_secret_keyring_init(Object *obj)
+{
+}
