diff --git a/libs/ardour/export_filename.cc b/libs/ardour/export_filename.cc
index 945af25dee..ef4fbea02b 100644
--- a/libs/ardour/export_filename.cc
+++ b/libs/ardour/export_filename.cc
@@ -55,6 +55,8 @@ ExportFilename::ExportFilename (Session & session) :
   include_timespan (true), // Include timespan name always
   include_time (false),
   include_date (false),
+  date_format (D_None),
+  time_format (T_None),
   session (session),
   revision (1),
   date_format (D_None),