diff --git a/stmhal/moduos.c b/stmhal/moduos.c
index 976d7f089d..0af682612e 100644
--- a/stmhal/moduos.c
+++ b/stmhal/moduos.c
@@ -133,7 +133,6 @@ STATIC const mp_map_elem_t os_module_globals_table[] = {
 
     { MP_OBJ_NEW_QSTR(MP_QSTR_uname), (mp_obj_t)&os_uname_obj },
 
-    { MP_OBJ_NEW_QSTR(MP_QSTR_chdir), (mp_obj_t)&mp_vfs_chdir_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_chdir), (mp_obj_t)&mp_vfs_chdir_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_getcwd), (mp_obj_t)&mp_vfs_getcwd_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_listdir), (mp_obj_t)&mp_vfs_listdir_obj },