-void mutt_edit_file (const char *, const char *);
-void mutt_curses_error (const char *, ...);
-void mutt_curses_message (const char *, ...);
+void mutt_edit_file (const char *);
+void mutt_curses_error (const char *, ...)
+ __attribute__((format(printf, 1, 2)));
+void mutt_curses_message (const char *, ...)
+ __attribute__((format(printf, 1, 2)));