diff --git a/src/pocketpy.h b/src/pocketpy.h
index dbbbe908..464f44bb 100644
--- a/src/pocketpy.h
+++ b/src/pocketpy.h
@@ -200,10 +200,9 @@ inline void init_builtins(VM* _vm) {
     });
 
     _vm->bind__repr__(_vm->tp_object, [](VM* vm, PyObject* obj) {
-        PyObject* self = obj;
-        if(is_tagged(obj)) self = nullptr;
+        if(is_tagged(obj)) FATAL_ERROR();
         std::stringstream ss;
-        ss << "<" << OBJ_NAME(vm->_t(self)) << " object at " << std::hex << self << ">";
+        ss << "<" << OBJ_NAME(vm->_t(obj)) << " object at " << std::hex << obj << ">";
         return VAR(ss.str());
     });
 
diff --git a/src/vm.h b/src/vm.h
index d56a606b..65bbbbad 100644
--- a/src/vm.h
+++ b/src/vm.h
@@ -340,9 +340,8 @@ public:
 
 #define BIND_UNARY_SPECIAL(name)                                                        \
     void bind##name(Type type, PyObject* (*f)(VM* vm, PyObject*)){                      \
-        PyObject* obj = _t(type);                                                       \
         _all_types[type].m##name = f;                                                   \
-        bind_method<0>(obj, #name, [](VM* vm, ArgsView args){                           \
+        bind_method<0>(_t(type), #name, [](VM* vm, ArgsView args){                      \
             return vm->_inst_type_info(args[0])->m##name(vm, args[0]);                  \
         });                                                                             \
     }