diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index beb5135ecd..a1c6fec416 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -1790,7 +1790,7 @@ Session::set_state (const XMLNode& node, int version)
 #endif
 	}
 #ifdef LIVETRAX
-	else {
+	else if (version != 3001) { // allow to load WTL sessions
 		error << string_compose (_("This is not a valid %1 session."), PROGRAM_NAME) << endmsg;
 		goto out;
 	}