diff --git a/dbus/org.freedesktop.UPower.Device.xml b/dbus/org.freedesktop.UPower.Device.xml
index a36595a..dab4648 100644
--- a/dbus/org.freedesktop.UPower.Device.xml
+++ b/dbus/org.freedesktop.UPower.Device.xml
@@ -572,11 +572,18 @@ method return sender=:1.386 -> dest=:1.477 reply_serial=2
     </property>
 
     <property name="Luminosity" type="d" access="read">
+      <annotation name="org.freedesktop.DBus.Deprecated" value="true"/>
       <doc:doc>
         <doc:description>
           <doc:para>
             Luminosity being recorded by the meter.
           </doc:para>
+          <doc:para>
+            DEPRECATED
+          </doc:para>
+          <doc:para>
+            This property is deprecated since the code it depends on was removed in 0.99.12
+          </doc:para>
         </doc:description>
       </doc:doc>
     </property>
diff --git a/libupower-glib/up-device.c b/libupower-glib/up-device.c
index f3271a1..32cb54b 100644
--- a/libupower-glib/up-device.c
+++ b/libupower-glib/up-device.c
@@ -376,8 +376,12 @@ up_device_to_text (UpDevice *device)
 			g_string_append_printf (string, "    charge-cycles:       %s\n", "N/A");
 	}
 	if (kind == UP_DEVICE_KIND_KEYBOARD) {
+		/* DEPRECATED. This property is deprecated since the code it depends on was removed in 0.99.12. */
+		#pragma GCC diagnostic push
+		#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 		if (up_exported_device_get_luminosity (priv->proxy_device) > 0)
 			g_string_append_printf (string, "    luminosity:          %g lx\n", up_exported_device_get_luminosity (priv->proxy_device));
+		#pragma GCC diagnostic pop
 	}
 	if (kind == UP_DEVICE_KIND_BATTERY ||
 	    kind == UP_DEVICE_KIND_UPS) {
@@ -693,7 +697,11 @@ up_device_set_property (GObject *object, guint prop_id, const GValue *value, GPa
 		up_exported_device_set_voltage (device->priv->proxy_device, g_value_get_double (value));
 		break;
 	case PROP_LUMINOSITY:
+		/* DEPRECATED. This property is deprecated since the code it depends on was removed in 0.99.12. */
+		#pragma GCC diagnostic push
+		#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 		up_exported_device_set_luminosity (device->priv->proxy_device, g_value_get_double (value));
+		#pragma GCC diagnostic pop
 		break;
 	case PROP_TIME_TO_EMPTY:
 		up_exported_device_set_time_to_empty (device->priv->proxy_device, g_value_get_int64 (value));
@@ -839,7 +847,11 @@ up_device_get_property (GObject *object, guint prop_id, GValue *value, GParamSpe
 		g_value_set_double (value, up_exported_device_get_voltage (device->priv->proxy_device));
 		break;
 	case PROP_LUMINOSITY:
+		/* DEPRECATED. This property is deprecated since the code it depends on was removed in 0.99.12. */
+		#pragma GCC diagnostic push
+		#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 		g_value_set_double (value, up_exported_device_get_luminosity (device->priv->proxy_device));
+		#pragma GCC diagnostic pop
 		break;
 	case PROP_TIME_TO_EMPTY:
 		g_value_set_int64 (value, up_exported_device_get_time_to_empty (device->priv->proxy_device));
@@ -1190,13 +1202,16 @@ up_device_class_init (UpDeviceClass *klass)
 	 *
 	 * The current luminosity of the device.
 	 *
+	 * NOTE: As of 1.91.1, this property is deprecated since the code it
+	 * depends on was removed in 0.99.12.
+	 *
 	 * Since: 0.9.19
 	 **/
 	g_object_class_install_property (object_class,
 					 PROP_LUMINOSITY,
 					 g_param_spec_double ("luminosity", NULL, NULL,
 							      0.0, G_MAXDOUBLE, 0.0,
-							      G_PARAM_READWRITE));
+							      G_PARAM_READWRITE | G_PARAM_DEPRECATED));
 	/**
 	 * UpDevice:time-to-empty:
 	 *