diff --git a/libs/ardour/audiosource.cc b/libs/ardour/audiosource.cc
index cd061ef0ef..f957375bee 100644
--- a/libs/ardour/audiosource.cc
+++ b/libs/ardour/audiosource.cc
@@ -91,6 +91,7 @@ AudioSource::AudioSource (Session& s, const string& name)
 	, peak_leftover_cnt (0)
 	, peak_leftover_size (0)
 	, peak_leftovers (0)
+	, peak_leftover_sample (0)
 	, _first_run (true)
 	, _last_scale (0.0)
 	, _last_map_off (0)
@@ -107,6 +108,7 @@ AudioSource::AudioSource (Session& s, const XMLNode& node)
 	, peak_leftover_cnt (0)
 	, peak_leftover_size (0)
 	, peak_leftovers (0)
+	, peak_leftover_sample (0)
 	, _first_run (true)
 	, _last_scale (0.0)
 	, _last_map_off (0)