From e9f4e040fcad377debfcf6c849bb8f8778b08591 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Fri, 26 Jul 2024 12:15:12 +0200
Subject: Fix build.

---
 src/wx/audio_backend.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/wx/audio_backend.h')

diff --git a/src/wx/audio_backend.h b/src/wx/audio_backend.h
index aa4adf13c..faca6eb0a 100644
--- a/src/wx/audio_backend.h
+++ b/src/wx/audio_backend.h
@@ -24,6 +24,7 @@ LIBDCP_DISABLE_WARNINGS
 #include <RtAudio.h>
 LIBDCP_ENABLE_WARNINGS
 #include <boost/optional.hpp>
+#include <boost/thread/mutex.hpp>
 
 
 
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