diff --git a/src/libslic3r/PerimeterGenerator.cpp b/src/libslic3r/PerimeterGenerator.cpp
index 24d73e3..b951b66 100644
--- a/src/libslic3r/PerimeterGenerator.cpp
+++ b/src/libslic3r/PerimeterGenerator.cpp
@@ -1784,7 +1784,7 @@ void PerimeterGenerator::process_classic(
     //w16
     ExPolygons fill_clip;
     ExPolygons top_fills;
-    if (loop_number > 0 && params.object_config.top_one_wall_type != TopOneWallType::None && upper_slices == nullptr)
+    if (loop_number > 0 && params.object_config.top_one_wall_type != TopOneWallType::Disable && upper_slices == nullptr)
         loop_number = 0;
     if (loop_number >= 0) {
         // In case no perimeters are to be generated, loop_number will equal to -1.
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index db1156d..e2e8a30 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -237,9 +237,9 @@ static t_config_enum_values s_keys_map_PerimeterGeneratorType {
 CONFIG_OPTION_ENUM_DEFINE_STATIC_MAPS(PerimeterGeneratorType)
 
 //w16
-static t_config_enum_values s_keys_map_TopOneWallType{{"not apply", int(TopOneWallType::None)},
-                                                      {"all top", int(TopOneWallType::Alltop)},
-                                                      {"Only top most", int(TopOneWallType::Onlytopmost)}};
+static t_config_enum_values s_keys_map_TopOneWallType{{"Disable", int(TopOneWallType::Disable)},
+                                                      {"all_top", int(TopOneWallType::Alltop)},
+                                                      {"Only_top_most", int(TopOneWallType::Onlytopmost)}};
 CONFIG_OPTION_ENUM_DEFINE_STATIC_MAPS(TopOneWallType)
 
 static void assign_printer_technology_to_unknown(t_optiondef_map &options, PrinterTechnology printer_technology)
@@ -3543,12 +3543,12 @@ void PrintConfigDef::init_fff_params()
     def->category = L("Layers and Perimeters");
     def->tooltip = L("Use only one wall on flat top surface, to give more space to the top infill pattern. Could be applyed on topmost surface or all top surface.");
     def->set_enum<TopOneWallType>({
-        { "none", L("None") },
-        { "Only top most", L("Onlytopmost") },
-        { "all top", L("Alltop") }
+        { "Disable", L("Disable") },
+        { "all_top", L("All top") },
+        { "Only_top_most", L("Only top most") }
     });
     def->mode = comAdvanced;
-    def->set_default_value(new ConfigOptionEnum<TopOneWallType>(TopOneWallType::None));
+    def->set_default_value(new ConfigOptionEnum<TopOneWallType>(TopOneWallType::Disable));
 
     def = this->add("wall_transition_length", coFloatOrPercent);
     def->label = L("Perimeter transition length");
diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index af9aad5..bdcd6ac 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -145,7 +145,7 @@ enum class PerimeterGeneratorType
 enum class GCodeThumbnailsFormat { QIDI,PNG, JPG, QOI };
 
 //w16
-enum class TopOneWallType { None, Alltop, Onlytopmost };
+enum class TopOneWallType { Disable, Alltop, Onlytopmost };
 
 #define CONFIG_OPTION_ENUM_DECLARE_STATIC_MAPS(NAME) \
     template<> const t_config_enum_names& ConfigOptionEnum<NAME>::get_enum_names(); \