diff --git a/libs/ardour/diskstream.cc b/libs/ardour/diskstream.cc
index a600cce5e2..f9f4424c48 100644
--- a/libs/ardour/diskstream.cc
+++ b/libs/ardour/diskstream.cc
@@ -344,7 +344,7 @@ int
 Diskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
 {
         if (!playlist) {
-                return;
+                return 0;
         }
 
         bool no_prior_playlist = true;