Fix audio channel count when bumping mono up to 5.1.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index 8a09f254b..c2cc00328 100644
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -72,13 +72,13 @@ Writer::Writer (shared_ptr<Film> f)
 
 	_picture_asset_writer = _picture_asset->start_write (_first_nonexistant_frame > 0);
 
-	if (_film->audio_channels() > 0) {
+	if (dcp_audio_channels (_film->audio_channels()) > 0) {
 		_sound_asset.reset (
 			new libdcp::SoundAsset (
 				_film->dir (_film->dcp_name()),
 				"audio.mxf",
 				DCPFrameRate (_film->frames_per_second()).frames_per_second,
-				_film->audio_channels(),
+				dcp_audio_channels (_film->audio_channels()),
 				dcp_audio_sample_rate (_film->audio_stream()->sample_rate())
 				)
 			);