diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 9061184188..6aa8dcd3d5 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1928,7 +1928,7 @@ bool GUI_App::is_blocking_printing(MachineObject *obj_)
     if (!dev) return true;
     std::string target_model;
     if (obj_ == nullptr) {
-        auto obj_ = dev->get_selected_machine();
+        obj_ = dev->get_selected_machine();
         if (obj_) {
             target_model = obj_->printer_type;
         }