diff --git a/system.cpp b/system.cpp
index 991bd140..af0ff023 100644
--- a/system.cpp
+++ b/system.cpp
@@ -837,6 +837,7 @@ void saveStats(bool emergency = false) {
   if(tour::on) return;
   #endif
   if(randomPatternsMode) return;
+  if(dual::state) return;
   if(archimedean) return;
   if(daily::on) return;
   if(peace::on) return;