--- a/src/player.c	2015-10-14 21:52:59.453971198 +0200
+++ b/src/player.c	2015-10-14 21:53:36.375289009 +0200
@@ -52,7 +52,7 @@
 {
   player->nick[0] = g_string_new (config->gui_player_name->str);
 
-  g_printerr (player->nick[0]->str);
+  g_printerr ("%s", player->nick[0]->str);
 
   gdk_threads_enter ();
   gtk_statusbar_push (GTK_STATUSBAR (gui_statusbar), 0,