Index: xfce4-xmms-plugin-0.5.2/panel-plugin/preferences.c
===================================================================
--- xfce4-xmms-plugin-0.5.2/panel-plugin/preferences.c.orig
+++ xfce4-xmms-plugin-0.5.2/panel-plugin/preferences.c
@@ -33,6 +33,7 @@
 
 #include <libxfce4util/libxfce4util.h>
 #include <libxfce4panel/xfce-panel-plugin.h>
+#include <libxfcegui4/dialogs.h>
 
 #include "preferences.h"
 #include "xmms_plugin.h"