--- Modules/posixmodule.c.t	2021-10-21 10:31:13.000000000 -0700
+++ Modules/posixmodule.c	2021-10-21 10:31:59.000000000 -0700
@@ -119,6 +119,12 @@
 #endif
 #endif
 
+#if defined(__APPLE__)
+#include <sys/types.h>
+#include <sys/uio.h>
+int sendfile(int fd, int s, off_t offset, off_t *len, struct sf_hdtr *hdtr, int flags);
+#endif
+
 #ifdef HAVE_DLFCN_H
 #include <dlfcn.h>
 #endif