diff --git a/libs/ardour/ardour/interthread_info.h b/libs/ardour/ardour/interthread_info.h
index 01cacf437c..a06fc649ca 100644
--- a/libs/ardour/ardour/interthread_info.h
+++ b/libs/ardour/ardour/interthread_info.h
@@ -29,7 +29,7 @@ namespace ARDOUR {
 
 	class InterThreadInfo {
 	public:
-		InterThreadInfo () : done (false), cancel (false), progress (0), thread (0) {}
+		InterThreadInfo () : done (false), cancel (false), progress (0), thread () {}
 
 		volatile bool  done;
 		volatile bool  cancel;