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-rw-r--r--py/stream.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/py/stream.c b/py/stream.c
index 6be2c4f3eb..5c161ec2dc 100644
--- a/py/stream.c
+++ b/py/stream.c
@@ -174,7 +174,7 @@ STATIC mp_obj_t stream_read(mp_uint_t n_args, const mp_obj_t *args) {
}
}
-mp_obj_t mp_stream_write(mp_obj_t self_in, const void *buf, mp_uint_t len) {
+mp_obj_t mp_stream_write(mp_obj_t self_in, const void *buf, size_t len) {
struct _mp_obj_base_t *o = (struct _mp_obj_base_t *)self_in;
if (o->type->stream_p == NULL || o->type->stream_p->write == NULL) {
// CPython: io.UnsupportedOperation, OSError subclass