diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 7f1974ad9..d83690fa0 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -3778,7 +3778,7 @@ void PrintConfigDef::init_fff_params()
     def->label = L("Tool name");
     def->category = OptionCategory::extruders;
     def->tooltip = L("Only used for klipper, where you can name the extruder. If not set, will be 'extruderX' with 'X' replaced by the extruder number.");
-    def->mode = comAdvanced;
+    def->mode = comExpert;
     def->set_default_value(new ConfigOptionStrings(""));
 
     def = this->add("top_infill_extrusion_width", coFloatOrPercent);
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 2be6322af..23dbacf84 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -1914,7 +1914,7 @@ bool Tab::create_pages(std::string setting_type_name, int idx_page)
             {
                 TabPrinter* tab = nullptr;
                 if ((tab = dynamic_cast<TabPrinter*>(this)) == nullptr) return;
-                if (m_config->opt_bool("single_extruder_multi_material") && tab->m_extruders_count > 1 && opt_key.find_first_of("nozzle_diameter") != std::string::npos)
+                if (m_config->opt_bool("single_extruder_multi_material") && tab->m_extruders_count > 1 && opt_key.find("nozzle_diameter") != std::string::npos)
                 {
                     SuppressBackgroundProcessingUpdate sbpu;
                     const double new_nd = boost::any_cast<double>(value);