Modules/_io/bufferedio.c (buffered_dealloc_warn): Make it static.
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 504e2cb..7661a00 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -387,7 +387,7 @@
/* Because this can call arbitrary code, it shouldn't be called when
the refcount is 0 (that is, not directly from tp_dealloc unless
the refcount has been temporarily re-incremented). */
-PyObject *
+static PyObject *
buffered_dealloc_warn(buffered *self, PyObject *source)
{
if (self->ok && self->raw) {