diff --git a/src/slic3r/GUI/CalibrationWizardPresetPage.cpp b/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
index 20ebe6f5cd..0715656ff9 100644
--- a/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
+++ b/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
@@ -1507,6 +1507,8 @@ void CalibrationPresetPage::update_combobox_filaments(MachineObject* obj)
     }
 
     Preset* printer_preset = get_printer_preset(obj, nozzle_value);
+    if (!printer_preset)
+        return;
 
     auto opt_extruder_type = printer_preset->config.option<ConfigOptionEnumsGeneric>("extruder_type");
     if (opt_extruder_type) {
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index a00e7677ae..fc1c29a637 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -1107,6 +1107,9 @@ bool Sidebar::priv::sync_extruder_list()
     PresetBundle *preset_bundle = wxGetApp().preset_bundle;
     std::string target_model_id  = preset_bundle->printers.get_selected_preset().get_printer_type(preset_bundle);
     Preset* machine_preset = get_printer_preset(obj);
+    if (!machine_preset)
+        return false;
+
     if (machine_print_name != target_model_id) {
         MessageDialog dlg(this->plater, _L("The currently selected machine preset is inconsistent with the connected printer type.\n"
                                             "Are you sure to continue syncing?"), _L("Sync extruder infomation"), wxICON_WARNING | wxYES | wxNO);