diff --git a/libnm-glib/nm-device-vlan.c b/libnm-glib/nm-device-vlan.c
index f28b86a1c0..26c234bdd5 100644
--- a/libnm-glib/nm-device-vlan.c
+++ b/libnm-glib/nm-device-vlan.c
@@ -137,7 +137,7 @@ nm_device_vlan_get_carrier (NMDeviceVlan *device)
  * nm_device_vlan_get_parent:
  * @device: a #NMDeviceVlan
  *
- * Returns: the device's parent device
+ * Returns: (transfer none): the device's parent device
  *
  * Since: 1.0
  **/
diff --git a/libnm/nm-device-vlan.c b/libnm/nm-device-vlan.c
index c4a036c1ec..fb6e3bd7b2 100644
--- a/libnm/nm-device-vlan.c
+++ b/libnm/nm-device-vlan.c
@@ -92,7 +92,7 @@ nm_device_vlan_get_carrier (NMDeviceVlan *device)
  * nm_device_vlan_get_parent:
  * @device: a #NMDeviceVlan
  *
- * Returns: the device's parent device
+ * Returns: (transfer none): the device's parent device
  **/
 NMDevice *
 nm_device_vlan_get_parent (NMDeviceVlan *device)