Issue #25923: Added more const qualifiers to signatures of static and private functions.
diff --git a/Python/_warnings.c b/Python/_warnings.c
index 978bad1..daa1355 100644
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -921,7 +921,7 @@
 #undef PyErr_Warn
 
 PyAPI_FUNC(int)
-PyErr_Warn(PyObject *category, char *text)
+PyErr_Warn(PyObject *category, const char *text)
 {
     return PyErr_WarnEx(category, text, 1);
 }