--- mythtv-31.0/mythtv/external/libudfread/default_blockinput.c.orig	2021-11-13 17:54:20.586889219 +0100
+++ mythtv-31.0/mythtv/external/libudfread/default_blockinput.c	2021-11-13 17:55:20.398989854 +0100
@@ -34,6 +34,7 @@
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
+#include <fcntl.h>
 
 #ifdef _WIN32
 #include <windows.h>
--- mythtv-31.0/mythtv/external/libmythdvdnav/dvdread/dvd_input.c.orig	2021-11-13 17:53:16.871716574 +0100
+++ mythtv-31.0/mythtv/external/libmythdvdnav/dvdread/dvd_input.c	2021-11-13 17:53:37.424094852 +0100
@@ -24,6 +24,7 @@
 #include <stdlib.h>                              /* free */
 #include <fcntl.h>                               /* open */
 #include <unistd.h>                              /* lseek */
+#include <dlfcn.h>
 
 #include "dvdread/dvd_reader.h"      /* DVD_VIDEO_LB_LEN */
 #include "dvd_input.h"