diff --git a/src/libslic3r/Config.hpp b/src/libslic3r/Config.hpp
index 538580d506..28410b87dc 100644
--- a/src/libslic3r/Config.hpp
+++ b/src/libslic3r/Config.hpp
@@ -1991,7 +1991,7 @@ public:
 
     void set_enum_labels(GUIType gui_type, const std::initializer_list<std::string_view> il) {
         this->enum_def_new();
-        assert(gui_type == GUIType::i_enum_open || gui_type == GUIType::f_enum_open || gui_type == ConfigOptionDef::GUIType::select_open);
+        assert(gui_type == GUIType::i_enum_open || gui_type == GUIType::f_enum_open || gui_type == ConfigOptionDef::GUIType::select_close);
         this->gui_type = gui_type;
         enum_def->set_labels(il);
     }