From f42ed7e6b5d039694d8bf8a02003d0091cbc34b0 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Mon, 27 Jan 2020 23:11:59 +0000
Subject: Add header guard.

---
 src/lib/audio_merger.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib/audio_merger.h b/src/lib/audio_merger.h
index dbc0c8691..e685a28bf 100644
--- a/src/lib/audio_merger.h
+++ b/src/lib/audio_merger.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef DCPOMATIC_AUDIO_MERGER_H
+#define DCPOMATIC_AUDIO_MERGER_H
+
 /** @file  src/audio_merger.h
  *  @brief AudioMerger class.
  */
@@ -81,3 +84,5 @@ private:
 	std::list<Buffer> _buffers;
 	int _frame_rate;
 };
+
+#endif
-- 
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