diff --git a/libs/ardour/ardour/file_source.h b/libs/ardour/ardour/file_source.h
index 265b2e14ee..652c9f59ee 100644
--- a/libs/ardour/ardour/file_source.h
+++ b/libs/ardour/ardour/file_source.h
@@ -63,6 +63,7 @@ public:
 	float                gain()            const { return _gain; }
 
 	virtual void set_gain (float g, bool temporarily = false) { _gain = g; }
+	virtual void set_channel (uint16_t c) { _channel = c; }
 
 	int set_state (const XMLNode&, int version);
 
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 076044f300..6cf035f984 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -5628,6 +5628,7 @@ Session::archive_session (const std::string& dest,
 	std::map<boost::shared_ptr<AudioFileSource>, std::string> orig_sources;
 	std::map<boost::shared_ptr<AudioFileSource>, std::string> orig_origin;
 	std::map<boost::shared_ptr<AudioFileSource>, float> orig_gain;
+	std::map<boost::shared_ptr<AudioFileSource>, uint16_t> orig_channel;
 
 	set<boost::shared_ptr<Source> > sources_used_by_this_snapshot;
 	if (only_used_sources) {
@@ -5746,6 +5747,7 @@ Session::archive_session (const std::string& dest,
 
 			orig_sources[afs] = afs->path();
 			orig_gain[afs]    = afs->gain();
+			orig_channel[afs] = afs->channel();
 
 			std::string new_path = make_new_media_path (afs->path (), to_dir, name);
 
@@ -5773,6 +5775,7 @@ Session::archive_session (const std::string& dest,
 				SndFileSource* ns = new SndFileSource (*this, *(afs.get()), new_path, compress_audio == FLAC_16BIT, progress);
 				afs->replace_file (new_path);
 				afs->set_gain (ns->gain(), true);
+				afs->set_channel (0);
 				delete ns;
 			} catch (...) {
 				error << "failed to encode " << afs->path() << " to " << new_path << endmsg;
@@ -5902,6 +5905,9 @@ Session::archive_session (const std::string& dest,
 	for (std::map<boost::shared_ptr<AudioFileSource>, float>::iterator i = orig_gain.begin (); i != orig_gain.end (); ++i) {
 		i->first->set_gain (i->second, true);
 	}
+	for (std::map<boost::shared_ptr<AudioFileSource>, uint16_t>::iterator i = orig_channel.begin (); i != orig_channel.end (); ++i) {
+		i->first->set_channel (i->second);
+	}
 
 	int rv = ar.create (filemap, compression_level);
 	remove_directory (to_dir);