diff --git a/py/objfun.c b/py/objfun.c
index 7d49f18..e626c15 100644
--- a/py/objfun.c
+++ b/py/objfun.c
@@ -147,7 +147,6 @@
     machine_uint_t n_def_args : 15;     // number of default arguments
     machine_uint_t takes_var_args : 1;  // set if this function takes variable args
     machine_uint_t takes_kw_args : 1;   // set if this function takes keyword args
-    uint n_state;           // total state size for the executing function (incl args, locals, stack)
     const byte *bytecode;   // bytecode for the function
     qstr *args;             // argument names (needed to resolve positional args passed as keywords)
     mp_obj_t extra_args[];  // values of default args (if any), plus a slot at the end for var args and/or kw args (if it takes them)
@@ -285,7 +284,7 @@
     DEBUG_printf("Calling: args=%p, n_args=%d, extra_args=%p, n_extra_args=%d\n", args, n_args, extra_args, n_extra_args);
     dump_args(args, n_args);
     dump_args(extra_args, n_extra_args);
-    mp_vm_return_kind_t vm_return_kind = mp_execute_byte_code(self->bytecode, args, n_args, extra_args, n_extra_args, self->n_state, &result);
+    mp_vm_return_kind_t vm_return_kind = mp_execute_byte_code(self->bytecode, args, n_args, extra_args, n_extra_args, &result);
     rt_globals_set(old_globals);
 
     if (vm_return_kind == MP_VM_RETURN_NORMAL) {
@@ -304,7 +303,7 @@
     .call = fun_bc_call,
 };
 
-mp_obj_t mp_obj_new_fun_bc(uint scope_flags, qstr *args, uint n_args, mp_obj_t def_args_in, uint n_state, const byte *code) {
+mp_obj_t mp_obj_new_fun_bc(uint scope_flags, qstr *args, uint n_args, mp_obj_t def_args_in, const byte *code) {
     uint n_def_args = 0;
     uint n_extra_args = 0;
     mp_obj_tuple_t *def_args = def_args_in;
@@ -326,7 +325,6 @@
     o->n_def_args = n_def_args;
     o->takes_var_args = (scope_flags & MP_SCOPE_FLAG_VARARGS) != 0;
     o->takes_kw_args = (scope_flags & MP_SCOPE_FLAG_VARKEYWORDS) != 0;
-    o->n_state = n_state;
     o->bytecode = code;
     if (def_args != MP_OBJ_NULL) {
         memcpy(o->extra_args, def_args->items, n_def_args * sizeof(mp_obj_t));
@@ -334,11 +332,10 @@
     return o;
 }
 
-void mp_obj_fun_bc_get(mp_obj_t self_in, int *n_args, uint *n_state, const byte **code) {
+void mp_obj_fun_bc_get(mp_obj_t self_in, int *n_args, const byte **code) {
     assert(MP_OBJ_IS_TYPE(self_in, &fun_bc_type));
     mp_obj_fun_bc_t *self = self_in;
     *n_args = self->n_args;
-    *n_state = self->n_state;
     *code = self->bytecode;
 }