diff --git a/Externals/WiiUseSrc/Src/wiiuse.h b/Externals/WiiUseSrc/Src/wiiuse.h
index 1df11b06b0..222158d8c5 100644
--- a/Externals/WiiUseSrc/Src/wiiuse.h
+++ b/Externals/WiiUseSrc/Src/wiiuse.h
@@ -677,8 +677,10 @@ WIIUSE_EXPORT extern void wiiuse_set_accel_threshold(struct wiimote_t* wm, int t
 WIIUSE_EXPORT extern int wiiuse_find(struct wiimote_t** wm, int max_wiimotes, int timeout);
 WIIUSE_EXPORT extern int wiiuse_connect(struct wiimote_t** wm, int wiimotes);
 WIIUSE_EXPORT extern void wiiuse_disconnect(struct wiimote_t* wm);
+#ifdef WIN32
 WIIUSE_EXPORT extern int wiiuse_check_system_notification(unsigned int nMsg, WPARAM wParam, LPARAM lParam);
 WIIUSE_EXPORT extern int wiiuse_register_system_notification(HWND hwnd);
+#endif
 
 /* events.c */
 WIIUSE_EXPORT extern int wiiuse_poll(struct wiimote_t** wm, int wiimotes);