diff --git a/libnotify/launch-context.c b/libnotify/launch-context.c
index facb43c..9469042 100644
--- a/libnotify/launch-context.c
+++ b/libnotify/launch-context.c
@@ -49,8 +49,8 @@ notification_app_launch_context_finalize (GObject *object)
 
 static char *
 notification_app_launch_context_get_startup_notify_id (GAppLaunchContext *context,
-                                                       GAppInfo *,
-                                                       GList *)
+                                                       GAppInfo *gai,
+                                                       GList *gl)
 {
         NotificationAppLaunchContext *self = NOTIFICATION_APP_LAUNCH_CONTEXT (context);