diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 66b38e72d3..d3b65210a4 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -3284,7 +3284,7 @@ Session::remove_empty_sounds ()
 {
 	PathScanner scanner;
 
-	vector<string *>* possible_audiofiles = scanner (sound_dir(), "\\.(wav|aiff|caf|w64)$", false, true);
+	vector<string *>* possible_audiofiles = scanner (sound_dir(), "\\.(wav|aiff|caf|w64|L|R)$", false, true);
 	
 	Glib::Mutex::Lock lm (audio_source_lock);