diff --git a/py/objstringio.c b/py/objstringio.c
index 212d8e3..a430fca 100644
--- a/py/objstringio.c
+++ b/py/objstringio.c
@@ -39,7 +39,7 @@
 #if MICROPY_CPYTHON_COMPAT
 STATIC void check_stringio_is_open(const mp_obj_stringio_t *o) {
     if (o->vstr == NULL) {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "I/O operation on closed file"));
+        mp_raise_msg(&mp_type_ValueError, "I/O operation on closed file");
     }
 }
 #else