diff --git a/src/proto/os_unix.pro b/src/proto/os_unix.pro
index 5fee8a5..ae0cdbb 100644
--- a/src/proto/os_unix.pro
+++ b/src/proto/os_unix.pro
@@ -82,6 +82,7 @@
 void start_xterm_trace(int button);
 void stop_xterm_trace(void);
 void clear_xterm_clip(void);
+void xterm_update(void);
 int clip_xterm_own_selection(Clipboard_T *cbd);
 void clip_xterm_lose_selection(Clipboard_T *cbd);
 void clip_xterm_request_selection(Clipboard_T *cbd);
@@ -92,4 +93,5 @@
 void stop_timeout(void);
 volatile sig_atomic_t *start_timeout(long msec);
 void delete_timer(void);
+int mch_create_anon_file(void);
 /* vim: set ft=c : */