diff --git a/libs/ardour/audio_track_importer.cc b/libs/ardour/audio_track_importer.cc
index af6d9a613a..4b145e1a9d 100644
--- a/libs/ardour/audio_track_importer.cc
+++ b/libs/ardour/audio_track_importer.cc
@@ -55,7 +55,7 @@ AudioTrackImportHandler::AudioTrackImportHandler (XMLTree const & source, Sessio
 		if ( (!type || type->value() == "audio") &&  ((*it)->property ("diskstream") != 0 || (*it)->property ("diskstream-id") != 0)) {
 			try {
 				elements.push_back (ElementPtr ( new AudioTrackImporter (source, session, *this, **it, pl_handler)));
-			} catch (failed_constructor err) {
+			} catch (failed_constructor const&) {
 				set_dirty();
 			}
 		}