diff --git a/inc/keyeventdefs.h b/inc/keyeventdefs.h
index eafd012..da5a699 100644
--- a/inc/keyeventdefs.h
+++ b/inc/keyeventdefs.h
@@ -4,6 +4,7 @@
 void process_io_events(void);
 void kb_trans(u_short keycode, u_short upflg);
 void taking_mouse_down(void);
+void taking_mouse_up(int newx, int newy);
 void copy_cursor(int newx, int newy);
 void cursor_hidden_bitmap(int x, int y);
 #endif