diff --git a/libs/ardour/wscript b/libs/ardour/wscript
index e3e513a810..6cb85b2bbe 100644
--- a/libs/ardour/wscript
+++ b/libs/ardour/wscript
@@ -8,7 +8,7 @@ import subprocess
 import sys
 
 # default state file version for this build
-CURRENT_SESSION_FILE_VERSION = 3002
+CURRENT_SESSION_FILE_VERSION = 4000
 
 I18N_PACKAGE = 'ardour'