--- mutt.h_ORIG	2021-09-16 01:37:19 +0000
+++ mutt.h	2021-09-16 01:37:59 +0000
@@ -32,6 +32,7 @@
 #include <limits.h>
 #include <stdarg.h>
 #include <signal.h>
+#include <fcntl.h>
 /* On OS X 10.5.x, wide char functions are inlined by default breaking
  * --without-wc-funcs compilation
  */