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-rw-r--r--Modules/_io/textio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 333c93f..ba28d59 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -1479,7 +1479,7 @@ textiowrapper_read(textio *self, PyObject *args)
CHECK_INITIALIZED(self);
- if (!PyArg_ParseTuple(args, "|n:read", &n))
+ if (!PyArg_ParseTuple(args, "|O&:read", &_PyIO_ConvertSsize_t, &n))
return NULL;
CHECK_CLOSED(self);