diff --git a/src/gatt-dbus.c b/src/gatt-dbus.c
index ef137a8..cdb46c4 100644
--- a/src/gatt-dbus.c
+++ b/src/gatt-dbus.c
@@ -179,6 +179,30 @@ static void proxy_read_cb(struct btd_attribute *attr,
 	result(0, value, len, user_data);
 }
 
+static void proxy_write_reply(const DBusError *derr, void *user_data)
+{
+	if (derr)
+		DBG("Write reply: %s", derr->message);
+}
+
+static void proxy_write_cb(struct btd_attribute *attr,
+					const uint8_t *value, size_t len)
+{
+	GDBusProxy *proxy;
+
+	proxy = g_hash_table_lookup(proxy_hash, attr);
+	if (!proxy)
+		/* FIXME: Attribute not found */
+		return;
+
+	g_dbus_proxy_set_property_array(proxy, "Value", DBUS_TYPE_BYTE,
+						value, len, proxy_write_reply,
+						NULL, NULL);
+
+	DBG("Server: Write characteristic callback %s",
+					g_dbus_proxy_get_path(proxy));
+}
+
 static int register_external_service(const struct external_app *eapp,
 							GDBusProxy *proxy)
 {
@@ -238,7 +262,8 @@ static int register_external_characteristics(GSList *proxies)
 		 * Reference table 3.5: Characteristic Properties bit field.
 		 */
 
-		attr = btd_gatt_add_char(&uuid, 0x00, proxy_read_cb, NULL);
+		attr = btd_gatt_add_char(&uuid, 0x00, proxy_read_cb,
+							proxy_write_cb);
 		if (attr == NULL)
 			return -EINVAL;