diff --git a/include/pocketpy/objects/base.h b/include/pocketpy/objects/base.h
index 274abcae..08ccc29b 100644
--- a/include/pocketpy/objects/base.h
+++ b/include/pocketpy/objects/base.h
@@ -35,19 +35,6 @@ typedef struct py_TValue {
 static_assert(sizeof(py_CFunction) <= 8, "sizeof(py_CFunction) > 8");
 static_assert(sizeof(py_TValue) == 16, "sizeof(py_TValue) != 16");
 
-/* predefined vars */
-const static py_Type tp_object = {1}, tp_type = {2};
-const static py_Type tp_int = {3}, tp_float = {4}, tp_bool = {5}, tp_str = {6};
-const static py_Type tp_list = {7}, tp_tuple = {8};
-const static py_Type tp_slice = {9}, tp_range = {10}, tp_module = {11};
-const static py_Type tp_function = {12}, tp_nativefunc = {13}, tp_bound_method = {14};
-const static py_Type tp_super = {15}, tp_exception = {16}, tp_bytes = {17}, tp_mappingproxy = {18};
-const static py_Type tp_dict = {19}, tp_property = {20}, tp_star_wrapper = {21};
-const static py_Type tp_staticmethod = {22}, tp_classmethod = {23};
-const static py_Type tp_none_type = {24}, tp_not_implemented_type = {25};
-const static py_Type tp_ellipsis = {26};
-const static py_Type tp_syntax_error = {27}, tp_stop_iteration = {28};
-
 extern py_TValue PY_NULL;
 
 #ifdef __cplusplus
diff --git a/include/pocketpy/pocketpy.h b/include/pocketpy/pocketpy.h
index c95ea60b..7c37740c 100644
--- a/include/pocketpy/pocketpy.h
+++ b/include/pocketpy/pocketpy.h
@@ -330,6 +330,20 @@ bool py_checktype(const py_Ref self, py_Type type);
 #include "pocketpy/xmacros/magics.h"
 #undef MAGIC_METHOD
 
+enum py_PredefinedTypes{
+    tp_object = 1, tp_type,
+    tp_int, tp_float, tp_bool, tp_str,
+    tp_list, tp_tuple,
+    tp_slice, tp_range, tp_module,
+    tp_function, tp_nativefunc, tp_bound_method,
+    tp_super, tp_exception, tp_bytes, tp_mappingproxy,
+    tp_dict, tp_property, tp_star_wrapper,
+    tp_staticmethod, tp_classmethod,
+    tp_none_type, tp_not_implemented_type,
+    tp_ellipsis,
+    tp_syntax_error, tp_stop_iteration
+};
+
 #ifdef __cplusplus
 }
 #endif