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-rw-r--r--libs/ardour/audiofilter.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/libs/ardour/audiofilter.cc b/libs/ardour/audiofilter.cc
index 843a3a7d34..a26d9674bd 100644
--- a/libs/ardour/audiofilter.cc
+++ b/libs/ardour/audiofilter.cc
@@ -30,6 +30,7 @@
#include "i18n.h"
using namespace ARDOUR;
+using namespace PBD;
int
AudioFilter::make_new_sources (AudioRegion& region, AudioRegion::SourceList& nsrcs)