--- a/blackmagic-io-12.8.1a1/bm_locks.c	2024-02-09 02:02:38.000000000 +0100
+++ b/blackmagic-io-12.8.1a1/bm_locks.c	2024-03-11 22:08:00.559132781 +0100
@@ -25,6 +25,7 @@
 ** -LICENSE-END-
 */
 #include <linux/list.h>
+#include <linux/mutex.h>
 #include <linux/sched.h>
 #include <linux/spinlock.h>
 #include "bm_version.h"