diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index af5c79bd3..f21bbabf7 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -1061,6 +1061,7 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
 #endif // ENABLE_NEW_MENU_LAYOUT
 {
     arranging.store(false);
+    rotoptimizing.store(false);
     background_process.set_fff_print(&print);
 	background_process.set_sla_print(&sla_print);
     background_process.set_gcode_preview_data(&gcode_preview_data);