diff --git a/ui/gtk3/indicator.vala b/ui/gtk3/indicator.vala
index dac72b49..7da0fa92 100644
--- a/ui/gtk3/indicator.vala
+++ b/ui/gtk3/indicator.vala
@@ -139,12 +139,17 @@ class Indicator : IBus.Service
         m_watcher_interface_info =
                 m_watcher_node_info.lookup_interface(
                         NOTIFICATION_WATCHER_DBUS_IFACE);
-        check_connect();
+        try {
+            check_connect();
+        } catch (GLib.IOError e) {
+            warning("Failed to call dbus proxy: " + e.message);
+            return;
+        }
     }
 
-    private void check_connect() {
+    private async void check_connect() throws IOError {
         if (m_proxy == null) {
-            GLib.DBusProxy.new.begin(
+            m_proxy = yield new GLib.DBusProxy(
                     connection,
                     GLib.DBusProxyFlags.DO_NOT_LOAD_PROPERTIES |
                             GLib.DBusProxyFlags.DO_NOT_CONNECT_SIGNALS,
@@ -152,23 +157,7 @@ class Indicator : IBus.Service
                     NOTIFICATION_WATCHER_DBUS_ADDR,
                     NOTIFICATION_WATCHER_DBUS_OBJ,
                     NOTIFICATION_WATCHER_DBUS_IFACE,
-                    null,
-                    (obj, res) => {
-                            bus_watcher_ready(obj, res);
-                    });
-        } else {
-            bus_watcher_ready(null, null);
-        }
-    }
-
-    private void bus_watcher_ready(GLib.Object? obj, GLib.AsyncResult? res) {
-        if (res != null) {
-            try {
-                m_proxy = GLib.DBusProxy.new.end(res);
-            } catch (GLib.IOError e) {
-                warning("Failed to call dbus proxy: " + e.message);
-                return;
-            }
+                    null);
 
             m_proxy.notify["g-name-owner"].connect((obj, pspec) => {
                     var name = m_proxy.get_name_owner();
@@ -176,7 +165,10 @@ class Indicator : IBus.Service
                         check_connect();
             });
         }
+        bus_watcher_ready();
+    }
 
+    private void bus_watcher_ready() {
         var name = m_proxy.get_name_owner();
         // KDE panel does not run yet if name == null
         if (name == null)