diff --git a/libnm-core/nm-core-internal.h b/libnm-core/nm-core-internal.h
index 7547044a9d..ad17a1d01d 100644
--- a/libnm-core/nm-core-internal.h
+++ b/libnm-core/nm-core-internal.h
@@ -165,7 +165,13 @@ gpointer _nm_connection_check_main_setting (NMConnection *connection,
                                             GError **error);
 
 typedef struct {
-	int dummy;
+	struct {
+		guint64 val;
+		bool has;
+	} timestamp;
+
+	const char **seen_bssids;
+
 } NMConnectionSerializationOptions;
 
 GVariant *nm_connection_to_dbus_full (NMConnection *connection,
diff --git a/libnm-core/nm-setting-connection.c b/libnm-core/nm-setting-connection.c
index 6653ea37c7..6461ac9aeb 100644
--- a/libnm-core/nm-setting-connection.c
+++ b/libnm-core/nm-setting-connection.c
@@ -590,6 +590,26 @@ nm_setting_connection_get_timestamp (NMSettingConnection *setting)
 	return NM_SETTING_CONNECTION_GET_PRIVATE (setting)->timestamp;
 }
 
+static GVariant *
+_to_dbus_fcn_timestamp (const NMSettInfoSetting *sett_info,
+                        guint property_idx,
+                        NMConnection *connection,
+                        NMSetting *setting,
+                        NMConnectionSerializationFlags flags,
+                        const NMConnectionSerializationOptions *options)
+{
+	guint64 v;
+
+	v =   options && options->timestamp.has
+	    ? options->timestamp.val
+	    : NM_SETTING_CONNECTION_GET_PRIVATE (setting)->timestamp;
+
+	if (v == 0u)
+		return NULL;
+
+	return g_variant_new_uint64 (v);
+}
+
 /**
  * nm_setting_connection_get_read_only:
  * @setting: the #NMSettingConnection
@@ -1875,6 +1895,13 @@ nm_setting_connection_class_init (NMSettingConnectionClass *klass)
 	                         NM_SETTING_PARAM_FUZZY_IGNORE |
 	                         G_PARAM_STATIC_STRINGS);
 
+	_properties_override_add_override (properties_override,
+	                                   obj_properties[PROP_TIMESTAMP],
+	                                   G_VARIANT_TYPE_UINT64,
+	                                   _to_dbus_fcn_timestamp,
+	                                   NULL,
+	                                   NULL);
+
 	/**
 	 * NMSettingConnection:read-only:
 	 *
diff --git a/libnm-core/nm-setting-wireless.c b/libnm-core/nm-setting-wireless.c
index 08373df35e..cfcc72b49d 100644
--- a/libnm-core/nm-setting-wireless.c
+++ b/libnm-core/nm-setting-wireless.c
@@ -725,6 +725,34 @@ nm_setting_wireless_get_seen_bssid (NMSettingWireless *setting,
 	return priv->seen_bssids->pdata[i];
 }
 
+static GVariant *
+_to_dbus_fcn_seen_bssids (const NMSettInfoSetting *sett_info,
+                          guint property_idx,
+                          NMConnection *connection,
+                          NMSetting *setting,
+                          NMConnectionSerializationFlags flags,
+                          const NMConnectionSerializationOptions *options)
+{
+	NMSettingWirelessPrivate *priv;
+
+	if (   options
+	    && options->seen_bssids) {
+		return   options->seen_bssids[0]
+		       ? g_variant_new_strv (options->seen_bssids, -1)
+		       : NULL;
+	}
+
+	priv = NM_SETTING_WIRELESS_GET_PRIVATE (setting);
+
+	if (   !priv->seen_bssids
+	    || priv->seen_bssids->len == 0)
+		return NULL;
+
+	return g_variant_new_strv ((const char *const*) priv->seen_bssids->pdata, priv->seen_bssids->len);
+}
+
+/*****************************************************************************/
+
 static gboolean
 verify (NMSetting *setting, NMConnection *connection, GError **error)
 {
@@ -1605,6 +1633,13 @@ nm_setting_wireless_class_init (NMSettingWirelessClass *klass)
 	                        NM_SETTING_PARAM_FUZZY_IGNORE |
 	                        G_PARAM_STATIC_STRINGS);
 
+	_properties_override_add_override (properties_override,
+	                                   obj_properties[PROP_SEEN_BSSIDS],
+	                                   G_VARIANT_TYPE_STRING_ARRAY,
+	                                   _to_dbus_fcn_seen_bssids,
+	                                   NULL,
+	                                   NULL);
+
 	/**
 	 * NMSettingWireless:mtu:
 	 *