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-rw-r--r--Modules/socketmodule.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 9b58a11bd5..2c8a29cc92 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -4132,6 +4132,11 @@ socket_sethostname(PyObject *self, PyObject *args)
Py_buffer buf;
int res, flag = 0;
+#ifdef _AIX
+/* issue #18259, not declared in any useful header file */
+extern int sethostname(const char *, size_t);
+#endif
+
if (!PyArg_ParseTuple(args, "S:sethostname", &hnobj)) {
PyErr_Clear();
if (!PyArg_ParseTuple(args, "O&:sethostname",