diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 0cbcfceba9..cd547a6bb5 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -6618,7 +6618,7 @@ Session::source_search_path (DataType type) const
 		break;
 	}
 
-	return sp;
+	return std::move(sp);
 }
 
 void